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:
May. 19, 1992
Filed:
Nov. 08, 1990
Applicant:
Inventors:
William D Mack, Cupertino, CA (US);
Daniel J Linebarger, San Jose, CA (US);
Assignee:
North American Philips Corp., Signetics Division, Sunnyvale, CA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03F / ; H03F / ;
U.S. Cl.
CPC ...
330261 ; 330260 ;
Abstract
The tail current of a differential transistor pair (12 and 14) is controlled by a feed-back means (40) that couples the pair's tail node (16) to the control input of each transistor for controlling a biasing current through each transistor. The control input of each transistor further receives an input signal in addition to an output signal of the feed-back means. As a result, the circuit has a stable and accurate tail current, and in addition is suitable for a low-voltage supply or for high-current operation.