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:
May. 26, 2020
Filed:
Mar. 07, 2018
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventor:
Takehiro Yamamoto, Matsumoto, JP;
Assignee:
SEIKO EPSON CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03B 5/30 (2006.01); H03B 5/36 (2006.01); H03B 5/04 (2006.01);
U.S. Cl.
CPC ...
H03B 5/04 (2013.01); H03B 5/364 (2013.01); H03B 2200/0062 (2013.01);
Abstract
An oscillation circuit that causes a vibrator to oscillate includes a bipolar transistor for oscillation, a P-type transistor having a gate to which a collector voltage of the bipolar transistor is input and a source to which a base of the bipolar transistor is connected, a first current source that supplies a current to the bipolar transistor, and a second current source that supplies a current to the P-type transistor.