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. 13, 2018
Filed:
Aug. 24, 2016
Seiko Epson Corporation, Tokyo, JP;
Toru Shirotori, Minamiminowa, JP;
Hisashi Yamaguchi, Fujimi, JP;
Masaki Wakamori, Shiojiri, JP;
Toshiya Usuda, Ina, JP;
Sho Matsuzaki, Ina, JP;
Tsuyoshi Yoneyama, Chino, JP;
Masayuki Kamiyama, Chino, JP;
Hiroshi Kiya, Suwa, JP;
Seiko Epson Corporation, , JP;
Abstract
An oscillation circuit includes an oscillating circuit adapted to oscillate a resonator element having a frequency-temperature characteristic, and a frequency adjustment circuit having a capacitance circuit connected to the oscillating circuit and adapted to adjust an oscillation frequency of the oscillating circuit, and a logic circuit, to which a signal having been output from the oscillating circuit is input, and which adjusts a frequency of the signal, and the frequency adjustment circuit compensates the frequency-temperature characteristic using at least the capacitance circuit in a predetermined temperature range, and compensates the frequency-temperature characteristic using the logic circuit alone outside the predetermined temperature range.