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:
Aug. 11, 2009
Filed:
Dec. 20, 2007
Hiroyuki Nakamura, Atsugi, JP;
Hiroyuki Nakamura, Atsugi, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
There is provided a differential signal comparator which maintains the duty ratio of complementary input signals. The differential signal comparator includes differential amplifier circuitsandreceiving complementary input signals, a plurality of current amplifier circuitstofor amplifying current output from the differential amplifier circuits and a current arithmetic operation circuitfor an arithmetic operation of an output from the plurality of current amplifier circuitstoat the time of converting the differential signal between the complementary input signals into a voltage of CMOS level, wherein a capacitive load of an output of the differential amplifier circuit is constant independent of a level of the input signals. A voltage signal which is current-voltage converted to a complementary CMOS level signal is input into a differential comparator to obtain a single end CMOS level signal.