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:
Nov. 15, 2011
Filed:
Nov. 16, 2009
Shigehisa Kurogo, Chigasaki, JP;
Masayuki Ishikawa, Ebina, JP;
Atsushi Kiyohara, Chigasaki, JP;
Takehiro Yamamoto, Machida, JP;
Norihito Matsukawa, Suwa, JP;
Shigehisa Kurogo, Chigasaki, JP;
Masayuki Ishikawa, Ebina, JP;
Atsushi Kiyohara, Chigasaki, JP;
Takehiro Yamamoto, Machida, JP;
Norihito Matsukawa, Suwa, JP;
Seiko Epson Corporation, , JP;
Abstract
A voltage control type temperature compensation piezoelectric oscillator, includes: a voltage control type oscillation circuit; an automatic frequency control (AFC) circuit outputting a control voltage for controlling an oscillation frequency of the voltage control type oscillation circuit based on an external control voltage; a temperature compensation voltage generating circuit generating a temperature compensation voltage; and a gain variable circuit varying a gain of the temperature compensation voltage. In the oscillator, the gain variable circuit is controlled by the control voltage outputted from the AFC circuit, and the oscillation frequency of the voltage control type oscillation circuit is controlled by an output voltage of the gain variable circuit.