EXHIBIT 31.2
 CERTIFICATION PURSUANT TO RULE 13a-14(a) OR 15d-14(a) OF THE EXCHANGE ACT, AS ADOPTED
PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002
  1.
    
    I have reviewed this annual report on Form 10-K of RF Micro Devices, Inc.;2.
    
    Based on my knowledge, this report does not contain any untrue statement of a material fact
or omit to state a material
fact necessary to make the statements made, in light of the circumstances 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 financial information included
in this report, fairly present
in all material respects the financial condition, results of operations 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 for establishing and
maintaining disclosure controls and
procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control
over financial reporting
(as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:
 a)
    
    Designed such disclosure controls and procedures, or caused such disclosure controls
and procedures to be
designed under our supervision, to ensure that material information relating to the
registrant, including its
consolidated subsidiaries, is made known to us by others within those entities, particularly
during the period in
which this report is being prepared;b)
    
    Designed such internal control over financial reporting, or caused such internal
control over financial reporting
to be designed under our supervision, to provide reasonable assurance regarding the
reliability of financial
reporting and the preparation of financial statements for external purposes in accordance with
generally accepted
accounting principles;c)
    
    Evaluated the effectiveness of the registrants disclosure controls and procedures and
presented in this report our
conclusions about the effectiveness of the disclosure controls and procedures, as of the end
of the period covered
by this report based on such evaluation; andd)
    
    Disclosed in this report any change in the registrants internal control over financial
reporting that occurred during
the registrants most recent fiscal quarter (the registrants fourth fiscal quarter in the
case of an annual report) that
has materially affected, or is reasonably likely to materially affect, the registrants
internal control over financial
reporting; and
 5.
    
    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 audit committee of the
registrants board of directors (or
persons performing the equivalent functions):
 a)
    
    All significant deficiencies and material weaknesses in the design or operation of
internal control over financial
reporting which are reasonably likely to adversely affect the registrants ability to record,
process, summarize and
report financial information; andb)
    
    Any fraud, whether or not material, that involves management or other employees who
have a significant role in
the registrants internal control over financial reporting.Date: May 28, 2008
 /s/ WILLIAM A. PRIDDY, JR.William A. Priddy, Jr.Chief Financial Officer, Corporate Vice
President of Administration and Secretary