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. 21, 1986
Filed:
Jun. 18, 1985
Applicant:
Inventor:
Stephen R Schenck, McKinney, TX (US);
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
H03F / ;
U.S. Cl.
CPC ...
330254 ; 330253 ;
Abstract
An improved differential amplifier having improved immunity to signals on the power supply terminals (32,34) thereof. The low impedance path between the power supply terminals (32,34) of the amplifier and the second gain stage transistor (24) is removed and connected to a low noise reference. The source of the transistor (24) is provided as an output terminal (23) of the amplifier and can be optionally connected to any low noise reference. High impedance input current mirrors (47,55,63,67) are connected between the supply voltage rails (33,35) and the amplifier, thereby further reducing the amplifier's susceptibility to noise.