Exhibit 31
                    Certification of Chief Executive Officer
           Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002


     I, Raymond D. Zinn, certify that:
1.   I have reviewed this annual report on Form 10-K of Micrel, Incorporated;
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 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 designed in the Exchange Act Rules 13a-15(d) 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 control 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; and
     (d)   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 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; and
     (b)   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:   March 6, 2006           /S/ Raymond D. Zinn
                                ------------------------------
                                Raymond D. Zinn
                                President, Chief Executive Officer and Director
                                (Principal Executive Officer)

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<PAGE>

                    Certification of Chief Financial Officer
            Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

       I, Richard D. Crowley, certify that:
1.   I have reviewed this annual report on Form 10-K of Micrel, Incorporated;
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 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 designed in the Exchange Act Rules 13a-15(d) 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 control 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; and
     (d)   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 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; and
     (b)   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:   March 6, 2006           /S/ Richard D. Crowley
                                ------------------------------
                               Richard D. Crowley
                               Vice President, Finance and
                               Chief Financial Officer
                               (Principal Financial and Accounting Officer)


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