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:   February 28, 2007          /S/ Raymond D. Zinn
                                   -------------------------------------------
                                   Raymond D. Zinn
                                   President, Chief Executive Officer
                                   and Director (Principal Executive Officer)

<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:   February 28, 2007          /S/ Richard D. Crowley
                                   -------------------------------------------
                                   Richard D. Crowley
                                   Vice President, Finance and
                                   Chief Financial Officer
                                   (Principal Financial and Accounting Officer)