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:
Jun. 01, 2004
Filed:
Dec. 31, 2001
Katsuyuki Yonezawa, Kanagawa, JP;
Sony Corporation, , JP;
Abstract
A filter circuit includes two first differential circuits disposed on A and B sides, in each of which a ratio of the number of transistors to that of diodes is 1:4, and two second differential circuits disposed on the A and B sides, in each of which the ratio of the number of transistors to that of diodes is 4:1. Base electrodes of the transistors of the A-side first differential circuit and the A-side second differential circuit are connected to a circuit input terminal, while base electrodes of the transistors of the B-side first differential circuit and the B-side second differential circuit are connected to another circuit input terminal. A current source is connected to an A-side connection node for the A-side first differential circuit and the A-side second differential circuit and another current source is connected to a B-side connection node for the B-side first differential circuit and the B-side second differential circuit. A capacitor is connected between a connection point of the A-side connection node and a circuit output terminal and a connection point of the B-side connection node and another circuit output terminal.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile