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:
Dec. 08, 1992
Filed:
Jan. 02, 1990
Applicant:
Inventor:
Hideki Oto, Fukaya, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ; H04B / ;
U.S. Cl.
CPC ...
4551901 ; 4552001 ; 455339 ; 455341 ;
Abstract
A band switching filter circuit includes a first filter for filtering an input signal with predetermined characteristics to output a first filtered signal, and a second filter for filtering the first filtered signal output from the first filter with frequency characteristics of a band narrower than that of the frequency characteristics of the first filter to output a second filtered signal. A switching circuit selects the first filtered signal output from the first filter or the second filtered signal output from the second filter in accordance with the level of an input control signal.