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:
Feb. 26, 2019
Filed:
Oct. 18, 2016
Seiko Epson Corporation, Tokyo, JP;
Akihiro Fukuzawa, Hino, JP;
Seiko Epson Corporation, , JP;
Abstract
A circuit device includes an A/D conversion unit that performs A/D conversion of a temperature detection voltage applied from a temperature sensor unit and outputs temperature detection data, a processing unit that performs a temperature compensation process of an oscillation frequency on the basis of the temperature detection data, and an oscillation signal generation circuit that includes a D/A conversion unit and an oscillation circuit and generates an oscillation signal using frequency control data received from the processing unit and a vibrator. The D/A conversion unit includes modulation circuit that receives the frequency control data of (n+m) bits and modulates n-bit data on the basis of m-bit data of the frequency control data, a D/A converter that performs D/A conversion of the modulated n-bit data, and a filter circuit that smoothes the output voltage of the D/A converter.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile