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:
Jan. 22, 1991
Filed:
Sep. 25, 1989
Manfred Mauthe, Munich, DE;
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Abstract
An integrated compression amplifier that can be constructed in CMOS technology and whose threshold voltages are programmable. The compression amplifiers can be built into a multi-channel AGC device, so that the circuit can be co-integrated on a 'switched capacitor' filter chip in CMOS technology. The compression amplifier circuit essentially involve a feedback amplifier whose gain is controlled by the output amplitude. To this end, an amplifier SC having variable gain constructed as a 'switched capacitor' amplifier, a rectifier unit GR' as well as a low-pass filtr TP' are in a feedback branch and a two quadrant multiplier ZM1 is connected between the input and output Ue', Ua' of the compression amplifier. The output of the lo-pass filter TP' is thereby fed back onto the control input of the two quadrant multiplier ZM'.