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:
Aug. 16, 2005
Filed:
Jul. 18, 2003
Jyoti Mondal, Palatine, IL (US);
Neil L. Calanca, Crown Point, IN (US);
Matthew R. Miller, Palatine, IL (US);
Jyoti Mondal, Palatine, IL (US);
Neil L. Calanca, Crown Point, IN (US);
Matthew R. Miller, Palatine, IL (US);
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
A variable gain control amplifier () and method provides a substantially constant input impedance and output impedance, and provides a substantially constant noise figure and third order harmonic. The variable gain control amplifier () includes an amplifier stage including at least a first intermediate fixed gain stage () operative to produce a first intermediate signal () in response to the input signal (). The variable gain control amplifier () further includes at least a second intermediate fixed gain stage () operative to produce an output signal () in response to the first intermediate signal (). A feedback circuit () is operative to produce a gain control signal () in response to the output signal (). A gain control circuit () is coupled to the at least first intermediate fixed gain stage () and the second intermediate fixed gain stage (), and receives the gain control signal () to control an amplitude of the intermediate signal ().