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:
Sep. 25, 1990
Filed:
Jun. 16, 1989
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Abstract
A differential amplifier having externally controllable power consumption. The differential amplifier has an external circuit stage for signal-dependent setting of the power consumption. The circuit stage is composed of two field effect transistors connected parallel to one another that are arranged in series with a resistor of the output side via which the current source of the differential amplifier is set. The field effect transistors are driven by a level-converting circuit proceeding from the amplifier input, this level-converting circuit being equipped with a control circuit. The control circuit defines the operating points of the field effect transistors with and without applied input signal and thus controls the signal-dependent boosting of the amplifier current.