Demodulator with output level calibration

Details Demodulator with output level calibration Demodulator with output level calibration

2011-06-07

2011-06-07

Trinh, Sonny (Department: 2618)

Telecommunications

Transmitter and receiver at separate stations

Having measuring, testing, or monitoring of system or part

C455S337000, C455S226100

Reexamination Certificate

active

07957698

ABSTRACT:
A calibration circuit for calibrating an output level of a demodulator includes a test signal generator, an RSSI module and a calibration module. The test signal generator generates a test signal, and the RSSI module detects the test signal to generate a control signal, wherein the control signal controls the demodulator to process the test signal to generate a determined output signal. The calibration module then calibrates the RSSI module according to the output signal in order to calibrate the output level of the demodulator. When the control signal is utilized to selectively enable or disable a soft-mute function of the demodulator, the calibration module can be utilized to calibrate or determine the soft-mute function of the demodulator.

REFERENCES:
patent: 6188275 (2001-02-01), Mattisson et al.
patent: 6199594 (2001-03-01), Mezzalira
patent: 6603810 (2003-08-01), Bednekoff et al.
patent: 6895229 (2005-05-01), Schetelig et al.
patent: 7181205 (2007-02-01), Scott et al.
patent: 7541815 (2009-06-01), Ichiyama et al.
patent: 7554332 (2009-06-01), Ichiyama et al.

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