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:
Oct. 09, 2006
Filed:
Feb. 06, 2003
Hiroshi Yabe, Shiojiri, JP;
Shinji Nakamiya, Matsumoto, JP;
Tadao Kadowaki, Chino, JP;
Yoshiki Makiuchi, Chino, JP;
Hiroshi Yabe, Shiojiri, JP;
Shinji Nakamiya, Matsumoto, JP;
Tadao Kadowaki, Chino, JP;
Yoshiki Makiuchi, Chino, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
This invention relates to a crystal oscillation circuit that oscillates stably with a low power consumption. This crystal oscillation circuit comprises an inverting amplifier, a crystal oscillator, and a feedback circuit that inverts the phase of an output from this inverting amplifier and feeds it back as an input. The sum of the absolute value of the threshold voltage of a first semiconductor switching element and the absolute value of the threshold voltage of a second semiconductor switching element is set to be greater than or equal to the absolute value of the potential difference between first and second potentials, when said inverting amplifier includes the first and second semiconductor switching elements.