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:
Apr. 08, 1980
Filed:
Feb. 01, 1978
Saburo Takaoka, Tokyo, JP;
Pioneer Electronic Corporation, Tokyo, JP;
Abstract
A period-to-voltage converting device for producing an output voltage corresponding to the varying period of an input signal. The input signal is applied to a frequency divider and a simple logic circuit to control the charging and discharging of first and second capacitors. A charging circuit responsive to a first timing pulse having a width equal to half a period of an input signal charges the first capacitor to a predetermined voltage. A discharging circuit responsive to a second timing pulse having a width equal to the period of the input signal discharges the first capacitor at a constant rate. Another charging circuit responsive to a third timing pulse having a width equal to half a period of the input signal charges the second capacitor to the same voltage across the first capacitor, this voltage being the output voltage proportional to the period of the input signal.