Pulse or digital communications – Receivers – Automatic gain control
Reexamination Certificate
2011-07-12
2011-07-12
Ha, Dac V (Department: 2611)
Pulse or digital communications
Receivers
Automatic gain control
C455S234100, C455S240100, C455S245100, C327S306000, C327S332000
Reexamination Certificate
active
07978794
ABSTRACT:
A method for automatic gain control of a front-end for a digital video receiver is provided. The method includes the following steps. First, a radio frequency signal is received and converted to an intermediate frequency signal. Then, the IF signal is amplified according to a gain. Next, the amplified IF signal is demodulated into a base-band signal, and the base-band signal is encoded into a transport stream. After that, a DC level of a pulse width modulation signal is controlled by at least one variable resistor to adjust the gain, the PWM signal being related to a setting of the gain. Afterwards, a BER measurement at each potential setting of the gain and the variable resistor under one or more power levels of the RF signal is read, and an optimum setting of the gain and the variable resistor is selected according to the BER measurements.
REFERENCES:
patent: 6160443 (2000-12-01), Maalej et al.
patent: 6369857 (2002-04-01), Balaban et al.
patent: 6459458 (2002-10-01), Balaban
patent: 6728524 (2004-04-01), Yamanaka et al.
patent: 6965656 (2005-11-01), Koizumi
patent: 7054395 (2006-05-01), Azakami et al.
patent: 7715886 (2010-05-01), Kanno et al.
patent: 530491 (2003-05-01), None
Chen Ming-Yeong
Cheng Shin-Shiuan
Liao Shyuan
Ha Dac V
Himax Technologies Limited
Rabin & Berdo P.C.
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