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:
Dec. 28, 2010
Filed:
Sep. 07, 2007
Masahiro Kanai, Suwa, JP;
Eitaro Otsuka, Fujimi-cho, JP;
Naoki Yoshida, Suwa, JP;
Akihiro Fukuzawa, Suwa, JP;
Masahiro Kanai, Suwa, JP;
Eitaro Otsuka, Fujimi-cho, JP;
Naoki Yoshida, Suwa, JP;
Akihiro Fukuzawa, Suwa, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
An oscillation driver circuit includes a current-voltage converter which converts a current value of an oscillation signal in an oscillation loop into a voltage value, and a comparator which outputs a signal corresponding to the result of comparison between the output signal from the current-voltage converter and a given reference signal. The comparator has an output current limiting function. The oscillation driver circuit causes the vibrator to produce driving vibrations based on the output from the comparator.