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:
Mar. 10, 1987
Filed:
Jun. 16, 1986
Robert A Blauschild, Los Altos, CA (US);
Signetics Corporation, Sunnyvale, CA (US);
Abstract
An input portion (4, 6) of a differential amplifier circuit amplifies a differential input signal to produce an amplified signal between a pair of terminals. A summing section contains two complementary pairs of like-polarity amplifiers (13, 14 and 19, 20). Each has a first flow electrode, a second flow electrode, and a control electrode. A substantially constant bias voltage is supplied to the control electrodes of the first pair (13, 14) whose second electrodes are respectively coupled to the second electrodes of the second pair (19, 20). Their first electrodes are respectively coupled to the terminals and to corresponding impedance elements (11, 12). The control electrodes of the second pair are coupled together to receive a voltage dependent on the voltage at the second electrode of one (13) of the first pair so as to produce a representative output signal at the second electrode of the other (14) of the first pair.