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. 25, 1989
Filed:
Aug. 26, 1988
Hisakazu Hitomi, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kanagawa, JP;
Abstract
An automatic adjustment circuit for adjusting the time constant of a filter circuit, which receives a reference signal having a predetermined voltage and a clock signal. The adjustment circuit includes an integration circuit for generating an integrated signal having a variable voltage level with periodic peak values, which includes a controllable current generating circuit, a capacitor coupled for charging a current from the controllable current generating circuit and a switch for alternately charging and discharging the capacitor in response to the clock signal, a comparator for comparing the peak value with the reference voltage and generating a control signal for adjusting the time constant of the filter circuit and a feedback circuit coupled between the comparator and the controllable current generating circuit for automatically controlling the control signal.