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. 13, 2007
Filed:
Aug. 05, 2005
Jun Takaso, Tokyo, JP;
Tsutomu Yoshimura, Tokyo, JP;
Norio Higashisaka, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An amplifier circuit includes a first differential amplifier circuit, a second differential amplifier circuit which amplifies an output signal from the first differential amplifier circuit, and an active feedback circuit which performs waveform shaping on the output signal from the first differential amplifier circuit by feeding back an output signal from the second differential amplifier circuit. The active feedback circuit includes first and second transistors having collectors or drains respectively connected to respective output nodes of the first differential amplifier circuit, bases or gates respectively connected to two output nodes of the second differential amplifier circuit, and emitters or sources connected in common, and a first current source which has a first end connected to the emitters or sources of the first and second transistors, and a second end connected to a low-voltage power supply, and producing a current that can be externally adjusted.