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:
Jul. 23, 1991
Filed:
Mar. 28, 1990
Applicant:
Inventors:
Helmut Herrmann, Munchen, DE;
Rudolf Koch, Unterhaching, DE;
Assignee:
Siemens Aktiengesellschaft, Munich, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03F / ;
U.S. Cl.
CPC ...
330253 ; 330255 ; 330259 ;
Abstract
An integratable amplifier circuit includes a preamplifier stage, a drive stage, a push-pull end stage, and a regulating stage forming a differential value from a reference current and from a measurement current proportional to the static current flowing through the push-pull end stage. The regulating stage stores the diferential value or a value proportional thereto upon the occurrence of a control signal at a control input indicating the non-level control of the preamplifier stage and sets the static current of the push-pull end stage by varying the operating point of the push-pull end stage as a function of the stored value.