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:
Oct. 22, 1996
Filed:
Jun. 15, 1995
Joao N Ramalho, Eindhoven, NL;
Johannes O Voorman, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A differential amplifier with common-mode rejection for low supply voltages has a first and a second differential pair without transistors in the tails of the differential pairs and with proportional common-mode currents flowing through the first and the second differential pair. The differential amplifier includes a current mirror which feeds the common-mode current of the second differential pair (3, 4) back to the output terminals of the first differential pair for the rejection of common-mode currents at the output terminals. The voltage at the output terminals of the current mirror has a d.c. level which can be established by means of a first reference voltage source independently of the common-mode voltage at the input terminals of the differential amplifier.