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. 12, 1996
Filed:
Jun. 07, 1995
Hideyuki Hagino, Kumagaya, JP;
Michiro Yokote, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
An active bandpass filter offers freely settable values of quality factor Q and peak gain. The active bandpass filter has a first transistor, the base of which is connected to an input terminal of the filter via a first capacitance element, the collector of which is connected to a first constant voltage source, and the emitter of which is connected to a first constant current source or a resistance element. The active bandpass filter also has a second transistor, the base of which is connected both to a second constant voltage source via a first resistance element and to the emitter of the first transistor via a second capacitance element, the collector of which is connected both to an output terminal of the filter and, via a second resistance element, to the first constant voltage source, and the emitter of which is connected both to the base of the first transistor via a third resistance element, and also to a second constant current source or a resistance element.