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. 08, 1988
Filed:
Oct. 02, 1987
Charles Gerston, Scottsdale, AZ (US);
Edmund C Golbeck, Scottsdale, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
Amplifier circuitry includes a differential pair of transistors having commonly connected electrodes driven by a normally constant current supply transistor. Portions of the output signals developed by the differential transistors tend to vary with variations in the magnitude of a first power supply potential. A control circuit causes the magnitude of the normally constant current source to vary so that the other excursions of the output signal are substantially equal in magnitude to the first power supply potential to provide balanced signals across the load. A feedback circuit stabilizes the magnitude of the normally constant current supply transistors against variations in the magnitude of another power supply potential or in the constant current supply.