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. 20, 1997
Filed:
Sep. 06, 1995
Applicant:
Inventors:
Johan H Huijsing, Schipluiden, NL;
Ronald Hogervorst, Voorschoten, NL;
John Tero, Saratoga, CA (US);
Assignee:
Philips Electronics North America Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F / ; H03F / ;
U.S. Cl.
CPC ...
330253 ; 330258 ; 330261 ;
Abstract
Compact g.sub.m -control circuits for CMOS rail-to-rail input stages operating in strong inversion are provided. The G.sub.m -control circuit makes the sum of the gate-source voltages of the complementary input transistors, and therefore the g.sub.m of the input stage constant. The compact g.sub.m -control circuits implement a floating voltage source in the form of circuit elements between the N and P-channel input stage transistors and the positive and negative supply rails of the operational amplifier.