Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation
Reexamination Certificate
2007-02-27
2007-02-27
Urban, Edward F. (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Local control of receiver operation
C455S241100, C455S250100, C455S340000, C375S345000
Reexamination Certificate
active
10138681
ABSTRACT:
An automatic gain control system (100) and methods thereof for a receiver for providing a wide range of continuous gain control has been discussed. The AGC includes an input stage (120) for providing an indication of a strength of a received signal; an attenuator stage (107) operable to switch a fixed amount of attenuation for the received signal; a variable attenuator (109) to provide a variable amount of attenuation for said received signal, and a controller (135) responsive to said indication for providing a variable control signal (145) to the variable attenuator; wherein the controller concurrently changes the variable control signal to change in the opposite direction the variable amount of attenuation by approximately the fixed amount of attenuation whenever the attenuator stage is switched, thereby extending the range of continuous gain control beyond the range of the variable attenuator.
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Freytag Lynn R.
Hughes James David
Oakley John Richard
Bethards Charles W.
Le Nhan T.
Motorola Inc.
Urban Edward F.
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