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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.:

US 5293087 B1

PDFFull Text
Date of Patent:
Mar. 08, 1994

Filed:

Oct. 19, 1992

Filter circuit and filter integrated circuit

Applicant:
Inventors:

Hiroshi Hamano, Kawasaki, JP;

Izumi Amemiya, Kawasaki, JP;

Yoichi Oikawa, Kawasaki, JP;

Takuji Yamamoto, Kawasaki, JP;

Takeshi Ihara, Kawasaki, JP;

Yoshinori Nishizawa, Kawasaki, JP;

Assignee:

Fujitsu Limited, Kawasaki, JP;

Attorney:
Primary Examiner:

Richard A Bertsch

Assistant Examiner:

David W Scheuermann

Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
307520 ; 328167 ;
Abstract

A filter circuit and a filter integrated circuit capable of being used in a high frequency band comprises a first resistor R.sub.1 connected between an input signal source and an emitter of a common-base transistor TR.sub.1, a first capacitor C.sub.1 connected between said input signal source and a reference voltage point, a second capacitor C.sub.2 connected between said input signal source and a collector of the common-base transistor TR.sub.1, and a second resistor R.sub.2 connected between the collector of the common-base transistor and the reference voltage point. Thus, a low-pass filter which operates in a high frequency band and suppresses the influence of characteristic parameters over the filter characteristic can be constructed.

Find Patent Forward Citations

Hamano, Hiroshi. (1994). Filter circuit and filter integrated circuit (U.S. Patent No. 5293087). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5293087

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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