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:
Jun. 04, 2002
Filed:
Feb. 29, 2000
Andrew G. Zocher, Spring Grove, IL (US);
Timothy K. Coffman, Chandler, AZ (US);
Joseph P. Heck, Ft. Lauderdale, FL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A variable gain control circuit ( ) includes a programmable operational transconductance amplifier (OTA) circuit ( ) and a programmable conveying circuit ( ). The conveying circuit ( ) has a programmable differential circuit ( ) interconnected to a pair of programming inputs ( ). The pair of programming inputs ( ) is interconnected to a pair of programming inputs ( ) that set the gain of the OTA circuit ( ). When the OTA circuit ( ) is configured as an operational transconductance filter ( ), the programmable differential circuit ( ) can adjust the gain of the conveying circuit ( ) to compensate for changes in the input impedance of the filter ( ). The programming inputs ( ) that set the input impedance and bandwidth of the filter ( ) also control the amount of signal current transmitted by the conveying circuit ( ).