**EXHIBIT 31.2**

**CERTIFICATION PURSUANT TO RULE 13a-14(a) OR15d-14(a) OF THE EXCHANGE ACT, AS ADOPTED PURSUANT TO SECTION 302 OF THESARBANES-OXLEY ACT OF 2002**

I, William A.Priddy, Jr., certify that:

1.      I havereviewed this quarterly report on Form 10-Q of RF Micro Devices, Inc.;2.      Based on my knowledge, this report does not contain any untruestatement of a material fact or omit to state a material          fact necessary to make the statements made, in light of thecircumstances under which such statements were made, not          misleading with respect to the period covered by this report; 3.      Based on my knowledge, the financial statements, and other financialinformation included in this report, fairly present          in all material respects the financial condition, results ofoperations and cash flows of the registrant as of, and for, the          periods presented in this report; 4.      The registrant's other certifying officer(s) and I are responsible forestablishing and maintaining disclosure controls and          procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) andinternal control over financial reporting          (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for theregistrant and have:         a)     Designed such disclosure controls and procedures, or causedsuch disclosure controls and procedures to be                  designed under our supervision, to ensure that materialinformation relating to the registrant, including its                   consolidated subsidiaries, is made known to us by otherswithin those entities, particularly during the period in                  which this report is being prepared;

         b)    Designed such internal control over financial reporting, or caused suchinternal control over financial reporting                 to be designed under our supervision, to provide reasonableassurance regarding the reliability of financial                  reporting and the preparation of financial statements forexternal purposes in accordance with generally accepted                 accounting principles;         c)     Evaluated the effectiveness of the registrant's disclosurecontrols and procedures and presented in this report our                   conclusions about the effectiveness of the disclosurecontrols and procedures, as of the end of the period covered                   by this report based on such evaluation; and         d)     Disclosed in this report any change in the registrant’sinternal control over financial reporting that occurred during                   the registrant’s most recent fiscal quarter (the registrant’sfourth fiscal quarter in the case of an annual report) that                   has materially affected, or is reasonably likely tomaterially affect, the registrant’s internal control over financial                  reporting; and5.      The registrant's other certifying officer(s) and I have disclosed,based on our most recent evaluation of internal control          over financial reporting, to the registrant's auditors and the auditcommittee of the registrant's board of directors (or          persons performing the equivalent functions):         a)     All significant deficiencies and material weaknesses in thedesign or operation of internal control over financial                  reporting which are reasonably likely to adversely affect theregistrant's ability to record, process, summarize and                  report financial information; and         b)     Any fraud, whether or not material, that involves management orother employees who have a significant role in                  the registrant's internal control over financial reporting.           Date:  February 11, 2010

                                                                                                            /s/  William A. Priddy, Jr.                                                                                                                                                    WilliamA. Priddy, Jr.                                                                                                                    Chief Financial Officer, Corporate Vice                                                                                                                     Presidentof Administration and Secretary

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