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:
Nov. 17, 1981
Filed:
Nov. 01, 1979
Tsutomu Sugawara, Yokohama, JP;
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Abstract
A frequency characteristic-adjusting apparatus comprising a filter circuit formed of a first variable gain amplifier and a capacitor, a second variable gain amplifier for amplifying an output signal from the filter circuit, an amplifier for amplifying a signal denoting a difference between the amplitudes of an input signal to the filter circuit and an output signal therefrom, and an adder circuit for adding together output signals from the second variable gain amplifier and difference signal amplifier, and wherein the first and second gain amplifiers are connected to potentiometers, and the gains of the first and second variable gain amplifiers are varied in accordance with changes in the voltage supplied from the potentiometers to the amplifiers, while maintaining the prescribed relationship between the gains of the first and second variable gain amplifiers.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile