EXHIBIT 12.1

                RULE 13A-14(A) CERTIFICATION IN ACCORDANCE WITH
                  SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Roland Pudelko,  Executive Director, Chief Executive Officer and President of
Dialog Semiconductor Plc (the "Company"), certify that:

1.       I have reviewed this annual report on Form 20-F of the Company;

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 Company as of, and for, the periods presented in this report;

4.       The  Company'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)) for the Company
         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
         Company, 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)       Evaluated the  effectiveness of the Company'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

c)       Disclosed in this report any change in the Company's  internal  control
         over financial reporting that occurred during the period covered by the
         annual report that has materially affected,  or is reasonably likely to
         materially  affect,  the  Company's  internal  control  over  financial
         reporting; and

5.       The Company's other certifying  officer and I have disclosed,  based on
         our  most  recent   evaluation  of  internal   control  over  financial
         reporting,  to the  Company's  auditors and the audit  committee of the
         Company'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 Company'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  Company's  internal
         controls over financial reporting.



Date: April 15, 2005

/s/ Roland Pudelko
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Roland Pudelko
Executive Director, Chief Executive Officer and President