UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Form 10-Q

(Mark One)

For the Quarterly Period Ended April 3, 2005

OR

For the transition period from           to

Commission File Number 0-24758

Micro Linear Corporation

Registrant’s telephone number, including area code:
(408) 433-5200

     Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes þ No o

     Indicate by check mark whether the Registrant is an accelerated filer (as defined in Rule 12b-2 of the Exchange Act). Yes o No þ

     The number of shares of the Registrant’s Common Stock outstanding as of May 17, 2005, net of shares held in treasury, was 12,529,553.

TABLE OF CONTENTS

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PART I. FINANCIAL INFORMATION

Item 1. Financial Statements

MICRO LINEAR CORPORATION

See accompanying notes to unaudited condensed consolidated financial statements.

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MICRO LINEAR CORPORATION

See accompanying notes to unaudited condensed consolidated financial statements.

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MICRO LINEAR CORPORATION

See accompanying notes to unaudited condensed consolidated financial statements.

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MICRO LINEAR CORPORATION

1. Organization and Summary of Significant Accounting Policies

Organization

     Micro Linear Corporation is a fabless semiconductor company specializing in wireless integrated circuit solutions, which enable a variety of wireless products serving a global market. These transceivers can be used in many streaming wireless applications such as cordless phones, PHS handsets, wireless speakers and headphones, security cameras, game controllers, cordless headsets and other personal electronic appliances. Headquartered in San Jose, California, Micro Linear’s products are available through its authorized representatives and distributors worldwide.

Fiscal Year

     We report results of operations on the basis of fifty-two or fifty-three week periods, ending on the Sunday closest to December 31. Fiscal year 2004 ended on January 2, 2005. The first quarter of 2005 ended on April 3, 2005 and the first quarter of 2004 ended on March 28, 2004. For presentation purposes, the accompanying financial statements refer to the calendar year end and month end of each respective period.

Principles of Consolidation

     The consolidated financial statements include the accounts of Micro Linear Corporation and our wholly-owned subsidiary in the United Kingdom. All significant inter-company accounts and transactions have been eliminated.

     The Company has designated the U.S. dollar as the functional currency for its United Kingdom subsidiary since that subsidiary is dependent on the parent company’s economic environment. The gains and losses resulting from the transactions of the United Kingdom subsidiary are recorded as other income and expense. For the first quarters of 2005 and 2004, transaction gains and losses were not significant.

Basis of Presentation

     The consolidated financial statements included herein have been prepared by us in accordance with accounting principles generally accepted in the United States of America and reflect all adjustments, consisting of normal recurring adjustments, which in the opinion of management are necessary to state fairly our financial position, results of operations, and cash flows for the periods presented.

     The accompanying unaudited consolidated condensed financial statements have been prepared in accordance with the instructions to Form 10-Q, and therefore do not include all information and footnotes necessary for a fair presentation of financial position, results of operations and cash flows in conformity with generally accepted accounting principles. The unaudited condensed consolidated financial statements and notes should be read in conjunction with the consolidated financial statements and notes in the Annual Report on Form 10-K for the year ended January 2, 2005, filed with the Securities and Exchange Commission on April 4, 2005.

Use of Estimates

     The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements as well as the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates, and such differences may be material to the financial statements.

Net Loss Per Share

     Basic loss per share is computed by dividing net loss available to common stockholders by the weighted average number of common shares outstanding during the period. Diluted net loss per share includes the effect of all potentially dilutive common stock outstanding during the period. Diluted net loss per share excludes potential common stock if the effect is anti-dilutive. We compute diluted loss per share using the treasury stock method for stock options outstanding.

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     A total of 4,166,703 and 3,901,470 shares of potential common stock related to stock options were not included in the dilutive net loss per share calculations for the three months ending March 31, 2005 and 2004, respectively, because their effect would be anti-dilutive.

Stock-Based Compensation

     We account for our employee stock option plans in accordance with Accounting Principles Board No. 25, “Accounting for Stock Issued to Employees.” Under APB No. 25, compensation cost is measured as the excess, if any, of the quoted market price of our stock at the date of grant over the exercise price of the option granted. Compensation cost for stock options, if any, is recognized ratably over the vesting period. We provide additional pro forma disclosures as required under SFAS No. 123, “Accounting for Stock-Based Compensation” and SFAS No. 148, “Accounting for Stock-Based Compensation, Transition and Disclosure”.

     We account for stock issued to non-employees in accordance with the provisions of SFAS 123. Stock option awards issued to non-employees are accounted for at fair value using the Black-Scholes option-pricing model. The fair value of each non-employee stock award is remeasured at each period end until a commitment date is reached, which is generally the vesting date.

Pro Forma Net Loss

     As required by SFAS No. 123 and SFAS No. 148, we disclose our pro forma net loss as if we had accounted for our employee stock purchase plan, employee stock options and director stock options subsequent to December 31, 1994 under the fair value method of SFAS No. 123. We estimate the fair value for these options at the date of grant using the Black-Scholes option pricing model and the multiple option approach with the following weighted-average assumptions:

     The Black-Scholes option valuation model is intended for use in estimating the fair value of publicly traded options that have no vesting restrictions and are fully transferable, which differs significantly from the terms of our stock option awards. In addition, option valuation models require the input of highly subjective assumptions, including the expected stock price volatility and the expected life of the options before exercise, which greatly affect the calculated grant date fair value. The weighted average estimated fair values of shares issued under the Employee Stock Purchase Plan granted during the three months ended March 31, 2005 and 2004 were $1.44 and $1.52 respectively. The weighted average fair values at the date of grant of options granted under the employee and directors’ stock option plans during the three months ended March 31, 2005 and 2004 were $1.52 and $2.09 respectively.

     The following table illustrates the effect on our net loss and net loss per share if we had recorded compensation costs based on the estimated grant date fair value as defined by SFAS No. 123 for all granted stock-based awards.

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2. Financial Statement Details

Inventories consist of the following (in thousands):

Provision for Income Taxes

     The provision for income taxes for the three months ended March 31, 2005 consists mainly of minor taxes incurred by our branch office in Japan. The provision for the three months ended March 31, 2004 consists mainly of minimum state tax obligations and minor taxes incurred by our branch office in Japan. We did not record a benefit for income taxes related to our net losses in the U.S. as we believe that the available objective evidence creates sufficient uncertainty regarding the realization of the deferred tax assets such that we have recorded a full valuation allowance. The effective tax rate for the three months March 31, 2005 was 0.07%. The effective tax rate for the three months ended March 31, 2004 was 0.1%.

Comprehensive Loss

     For the three months March 31, 2005 and 2004, comprehensive loss, which consists of the net loss for the periods and unrealized gain or loss on short-term marketable securities, was as follows (in thousands):

3. Recent Accounting Pronouncements

     In December 2004, the FASB issued Statement of Financial Accounting Standards No. 123R (“SFAS No. 123R”), “Share-Based Payment,” an amendment to Statement of Financial Accounting Standards No. 123 (“SFAS No. 123”), “Accounting for Stock-Based Compensation” and Statement on Financial Accounting Standards No. 95, “Statement of Cash Flows.” The revised standard addresses the accounting for share-based payment transactions in which a company receives employee services in exchange for either equity instruments of the company or liabilities that are based on the fair value of the company’s equity instruments or that may be settled by the issuance of such equity instruments. Under the new standard, companies will no longer be able to account for share-based compensation transactions using the intrinsic method in accordance with APB 25. Instead, companies will be required to account for such transactions using a fair-value method and recognize the expense in the consolidated statement of income. In addition, the adoption of SFAS 123R will require additional accounting related to the income tax effects and additional disclosure regarding the cash flow effects resulting from share-based payment arrangements. On March 29, 2005, the Securities and Exchange Commission (SEC) issued Staff Accounting Bulletin 107 (SAB 107). This Bulletin summarizes the views of the SEC staff regarding the interaction between SFAS 123R, Share-Based Payment, and certain SEC rules and regulations and provides the SEC staff’s views regarding the valuation of share-based payment arrangements for public companies. In April 2005, the SEC postponed the implementation date of SFAS 123R to the fiscal year beginning after June 15, 2005. The Company has not yet determined which fair-value method and transitional provision it will follow. Currently, we disclose the pro forma net income (loss) and related pro forma income (loss) per share information in accordance with SFAS 123 and Statement on Financial Accounting Standards No. 148, “Accounting for Stock-Based Compensation Costs — Transition and Disclosure.” We believe that adoption of the new standard will have an adverse impact on our results of operations.

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     In November 2004, the FASB issued Statement of Financial Accounting Standards No. 151 (“SFAS No. 151”), “Inventory Costs, an amendment of ARB No. 43, Chapter 4”. SFAS No. 151 clarifies that abnormal inventory costs such as costs of idle facilities, excess freight and handling costs, and wasted materials (spoilage) are required to be recognized as current period charges. SFAS No. 151 will be effective in fiscal years beginning after June 15, 2005. The adoption of SFAS No. 151 is not expected to have a material effect on our financial position or results of operations.

     In December 2004, the FASB issued Statement of Financial Accounting Standards No. 153 (“SFAS No. 153”), “Exchange of Nonmonetary Assets, an amendment of APB Opinion No. 29”. SFAS No. 153 addresses the measurement of exchanges of nonmonetary assets and redefines the scope of transactions that should be measured based on the fair value of the assets exchanged. SFAS No. 153 will be effective for nonmonetary transactions in fiscal years beginning after June 15, 2005. The adoption of SFAS No. 153 is not expected to have a material effect on our financial position or results of operations.

4. Operations by Geographic Regions

The following is a summary of revenue by geographical regions (in thousands):

5. Restructuring Charges

     In the second quarter of 2004 we provided $0.2 million for our remaining lease obligations, net of expected sublease payments, on our Utah facility which we vacated in the first quarter of 2004. As of March 31, 2005, the remaining balance of our restructuring reserve relates to our continuing charges for rent on certain facilities which we abandoned in 2004 and subleased to another company and obligations on leased equipment that were used in those facilities (in thousands).

Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

     The statements in this report or incorporated by reference which are not historical are forward-looking statements and include, without limitation, statements under the caption, “Management’s Discussion and Analysis of Financial Condition and Results of Operations.” Terms such as “may,” “will,” “could,” “should,” “project,” “believe,” “anticipate,” “expect,” “plan,” “estimate,” “forecast,” “potential,” “intend,” “continue” and variations of these words or similar expressions are intended to identify forward-looking statements.

     These forward-looking statements include, but are not limited to, statements regarding: our expectation that we will continue to experience erosion in the sales of our legacy products and our anticipation of fluctuations in the selling prices and margins in such products, our beliefs regarding deferred tax assets, including our beliefs that the available objective evidence creates sufficient uncertainty regarding the realization of the deferred tax assets such that we have recorded a full valuation allowance, our expectation that international revenue will account for the substantial majority of our total net revenue for the foreseeable future, our expectation

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that research and development costs will vary from quarter to quarter depending on the stage of products in development and our intention to expend significant resources in the development of new products, our expectation regarding trade variables and accrued liability balances, our expectation that our capital expenditures will stay near first quarter levels in the coming quarter and that we will be able to provide for these expenditures without any additional sources of financing and our belief that existing cash resources are sufficient to fund any anticipated operating losses and purchases of capital equipment and provide adequate working capital for the next 12 months.

     Forward-looking statements are subject to risks and uncertainties that could cause actual results to differ materially from those projected. These risks and uncertainties include, but are not limited, to our dependence on key products and customers, changes in the demand for our products and seasonal factors affecting certain of our products, our ability to attract and retain customers and distribution partners for existing and new products, our ability to develop and introduce new and enhanced products in a timely manner, our dependence on international sales and risks associated with international operations, our dependence on outside foundries and test subcontractors in the manufacturing process and other outside suppliers, our ability to recruit and retain qualified employees, and the strength of competitive offerings and the prices being charged by those competitors, and the risks set forth below under “Factors that May Affect Future Operating Results”.

     These forward-looking statements are made only as of the date of this report. We do not undertake to update or revise the forward-looking statements, whether as a result of new information, future events or otherwise. We caution you not to give undue weight to any of the forward-looking statements. You should not regard the inclusion of forward-looking information as a representation by us or any other person that we will achieve our objectives or plans.

Critical Accounting Policies

     Management’s Discussion and Analysis of Financial Condition and Results of Operations are based upon our consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States. The preparation of these financial statements requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenue and expenses, and related disclosure of contingent assets and liabilities. Management bases its estimates on historical experience and other assumptions that are believed to be reasonable under the circumstances. These results form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Senior management has discussed the development, selection and disclosure of these estimates with the Audit Committee of Micro Linear’s Board of Directors. Actual results may differ from these estimates under different assumptions or conditions. Management believes the following critical accounting policies reflect its more significant estimates and assumptions used in the preparation of its consolidated financial statements. They include those regarding (1) revenue recognition, (2) estimating accrued liabilities and allowance for doubtful accounts, (3) inventory and related allowance for obsolete and excess inventory, (4) accounting for income taxes, and (5) valuation of long-lived and intangible assets.

     The critical accounting policies are described in Item 7, “Management Discussion and Analysis of Financial Condition and Results of Operations,” of our Annual Report on Form 10-K for the year ended January 2, 2005.

Overview

     Micro Linear Corporation is a fabless semiconductor company specializing in wireless integrated circuit solutions, which enable a variety of wireless products serving a global market. These transceivers can be used in many streaming wireless applications such as cordless phones, PHS handsets, wireless speakers and headphones, security cameras, game controllers, cordless headsets and other personal electronic appliances. Headquartered in San Jose, California, Micro Linear’s products are available through its authorized representatives and distributors worldwide.

     We were founded in 1983, and until 2000, we were a supplier of advanced analog and mixed signal integrated circuits to the computer, communications, telecommunications, consumer and industrial markets. During 2000, we divested our manufacturing test operation and our non-communication product lines and focused our marketing, engineering and product development on new communications products, including some wired networking products, but most notably wireless integrated circuits. During 2001, we established ourselves as a volume supplier of RF transceivers to the digital cordless telephone segment of the communications market.

     Wireless product revenue represented 74% of net revenue for the first quarter of 2005 compared to 56% of net revenue for the first quarter of 2004.

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Results of Operations

Three Months Ended March 31, 2005 Compared with Three Months Ended March 31, 2004

     The following tables present certain consolidated statements of operations data for the periods indicated (unaudited):

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Net Revenue

     Net revenue during the first quarter of 2005 increased $0.4 million from the comparable first quarter of 2004. Our wireless product net revenue increased $1.0 million during the first quarter of 2005, a 46% increase from the first quarter of 2004, while our networking products net revenue decreased $0.6 million during the first quarter of 2005, a 35% decrease from the comparable first quarter of 2004.

     The increase in wireless product revenue was primarily due to a combination of a 23% increase in unit shipment volumes, in the first quarter of 2005 over the comparable first quarter of 2004, and a 16% increase in the average selling prices of these products. The unit shipment volume increase was primarily due to the addition of a second major digital cordless telephone customer. The increase in our average selling prices compared to the year ago period was driven mainly by the higher average selling price of our 5.8GHz product, the ML5800, as compared to the average selling price of the ML2722, our 900MHz product that was shipping in volume during the first quarter of 2004.

     The decrease in networking product revenue was primarily due to a combination of a 24% decline in unit volume shipments of our legacy networking products and a 14% decrease in average selling prices of these products due to a shift in product mix. We expect continuing erosion in the sales of these legacy products and anticipate that the average selling prices and margins will continue to fluctuate from period to period due to changes in customer demand as well as product availability for those products that have been declared to be end-of-life.

     In the first quarter of 2005, sales to Uniden Corporation and Giant Electronics Ltd. (a subcontractor for Plantronics Corporation), each accounted for more than 10% of our net revenue. In the first quarter of 2004, sales to Uniden Corporation accounted for more than 10% of our net revenue.

     International revenue for the first quarter of 2005 totaled $4.0 million, or 94% of net revenue compared to $3.6 million or 93% of net revenue for the first quarter of 2004. Domestic revenue was approximately 6% of net revenue for the first quarter of 2005 compared to 7% for the first quarter of 2004. We expect that international revenue will account for the substantial majority of our total net revenue for the foreseeable future.

Gross Margin

     Gross margin is affected by the unit volume of product shipments, selling prices, product mix, manufacturing subcontract costs, manufacturing utilization, and product yields. It is also periodically affected by costs incurred in connection with start-up and installation of new process technologies at outside manufacturing foundries and test subcontractors.

     Gross margin during the first quarter of 2005 was 52%, as compared to 46% in the first quarter of 2004. Wireless product gross margin was 45% during the first quarter of 2005 as compared to 32% in the first quarter of 2004 and networking product gross margin was 70% during the first quarter of 2005 compared to 63% in the first quarter of 2004. During the first quarter of 2005, we sold approximately $41,000 of excess networking product inventory that was previously written off and recognized charges for approximately $46,000 to provide reserves for additional excess wireless products. Sales of previously reserved products and additions to the provisions for excess inventories were not significant in the first quarter of 2004.

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     The increase in wireless product gross margin in the first quarter of 2005 as compared to the same period in 2004 was primarily due to a 16% increase in average selling prices and a 7% decrease in direct unit product costs. The increase in our average selling prices was driven primarily by sales of our ML5800 product, which was shipping in volume during the first quarter of 2005 and which had a significantly higher average selling price than the average selling price of our ML2722 product, which was the highest volume wireless product that was shipping during the first quarter of 2004.

     Networking product gross margin increased to 70% in the first quarter of 2005 from 63% for the comparable first quarter of 2004. The increase in gross margin is mainly due to a shift in product mix in sales of our legacy networking products. We expect that the margin realized from these legacy products will continue to fluctuate from period to period due to changes in product mix resulting from changes in customer demand as well as product availability for those products that have been declared to be end-of-life.

Research and Development Expenses (R&D)

     Research and development expenses include costs associated with the definition, design and development of new products. In addition, research and development expenses include test development and prototype costs associated with new product development.

     We expense wafers and production mask sets related to new products as research and development costs until products based on new designs are fully characterized, support published data sheets and satisfy reliability tests.

     Research and development costs will vary from quarter to quarter depending on the stage of products in development. Research and development expenses decreased $0.4 million, during the first quarter of 2005 from the comparable first quarter of 2004, mainly due to decreases in outside services, prototype and equipment costs and other costs associated with the development and introduction of new products. We intend to expend significant resources in the development of new products during the foreseeable future.

Selling, General and Administrative Expenses (SG&A)

     The decrease in selling, general and administrative expenses for the first quarter of 2005, as compared to the first quarter of 2004, was primarily due to headcount reductions in our sales and marketing functions which was achieved from a realignment of our sales and marketing efforts.

Interest and Other Income and Interest and Other Expense

     The increase in interest and other income for the first three months of