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:
May. 14, 2002
Filed:
Apr. 26, 1999
Koichi Yamasaki, Chiba, JP;
Hiroshi Mukainakano, Chiba, JP;
Seiko Instruments Inc., , JP;
Abstract
A delay circuit includes a capacitor, a charging/discharging control circuit receptive of an input signal for controlling at least one of the charging and the discharging of the capacitor to set a delay time in accordance with a capacitance value of the capacitor, and a comparing circuit for comparing a voltage at a first terminal of the capacitor with a first reference voltage to produce an output signal which becomes inverted after the delay time when the voltage at the first terminal of the capacitor crosses over the first reference voltage during one of charging and discharging of the capacitor, and comparing a voltage at the first terminal of the capacitor with a second reference and producing an output signal which becomes inverted when the voltage at the first terminal of the capacitor is higher than the second reference voltage so that the delay time is reduced when the first terminal of the capacitor becomes short-circuited to an abnormally high voltage level.