The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 12, 2007
Filed:
Mar. 31, 2005
Applicant:
Hiroyuki Ogiso, Ina, JP;
Inventor:
Hiroyuki Ogiso, Ina, JP;
Assignee:
Seiko Epson Corporation, , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03B 5/30 (2006.01);
U.S. Cl.
CPC ...
Abstract
An oscillation circuit comprises a SAW resonator having a pair of reflectors disposed on a piezoelectric substrate and a pair of IDTs which are set up in parallel between the pair of reflectors and which are constituted by teeth-of-a-comb electrodes; an inverter to which the pair of IDTs are connected in parallel; and a change-over unit which is provided between each of a pair of the teeth-of-a-comb electrodes constituting either of the IDTs of the pair of IDTs and the inverter and which changes over and connects an input side and an output side of the inverter connected to each of the pair of the teeth-of-a-comb electrodes.