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. 05, 2007
Filed:
Aug. 26, 2003
Charles R. Ruelke, Margate, FL (US);
Moshe Ben-ayun, Shoham, IL;
David J. Graham, Gilbert, AZ (US);
Mark Rozental, Gedera, IL;
Charles R. Ruelke, Margate, FL (US);
Moshe Ben-Ayun, Shoham, IL;
David J. Graham, Gilbert, AZ (US);
Mark Rozental, Gedera, IL;
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
An automatic gain control (AGC) method and circuit () within a receiver uses a digital state machine () to implement the AGC function. independent from interaction with a host processor () and for multiple modulation protocols without duplicating circuitry. Modulation protocol and parameters for any of various gain responses are stored in a register (). Multiple states, each corresponding to a predetermined range of RF input signal strength, are stored in the register. Each state contains parameters that determine a gain control signal for controlling a variable gain amplifier (). The states are independent and may be selectively disabled to create asymmetric responses. Within any state, an adaptable number of iterations may be set to implement a different update rate or step size after a predetermined number of closed loop gain change iterations has not resulted in a transition to a state that represents a desired output gain.