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:
Jul. 01, 2003
Filed:
Mar. 28, 2001
Takao Saeki, Gunma, JP;
Hiroya Yamamoto, Ashikaga, JP;
Takashi Iijima, Gunma, JP;
Jun Suzuki, Gunma, JP;
Masaki Kinoshita, Ota, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
Transistors ( ) turn on and off with mutually opposite phase input signals. Capacitors ( ) discharge when the transistors ( ) turn on, and capacitors ( ) are charged by constant current from constant current sources ( ) when the transistors ( ) turn off. As a result, a gradually rising voltage is obtained at the positive input ends of comparators ( ) while the input signals are L. By comparing this with fixed voltages of reference sources ( ), signals having rise timing shifted from input signals by 90° are obtained. The outputs of the comparators ( ) are mutually shifted by 180°, and at the rise of these outputs, an RS flip-flop ( ) is set and reset so that signals delayed in phase by 90° with respect to the input signals are obtained at its outputs.