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:
Feb. 13, 2001
Filed:
Dec. 15, 1999
Takashi Fujiwara, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
Provided is a circuit arrangement for attaining an all-pass filter characteristics which have been conventionally attained by bipolar transistors, by using MIS transistors. An alternating-current signal is input to an input terminal of an inversion circuit having a two-fold amplification function through a low-pass filter. When output from the inversion circuit is input to a gate of a lower transistor of two MIS transistors cascaded and an inverted signal of the alternating-current signal is input to a gate of an upper transistor of the two MIS transistors cascaded, the alternating-current signal is subtracted from the output from the inversion circuit. In this manner, the all-pass filter is formed.