RF SIGNAL AUTOMATIC GAIN CONTROL METHOD

摘要

The automatic gain control (AGC) method contains the following steps: producing a feedback signal and transmitting the feedback signal to a signal processing unit to produce a working signal; transmitting the working signal to a first signal control unit to produce a first control voltage; transmitting the first control voltage to a second signal control unit to produce a second control voltage, which is a fixed voltage; and transmitting the second control voltage to an AGC unit where the fixed second control voltage is used as a reference value. As such, when a radio-frequency (RF) input signal varies due to channel loading variation, an RF output signal by the AGC unit can be maintained within a specified dB range.

主权项

1. A radio-frequency (RF) signal automatic gain control method, comprising the steps of:
producing a feedback signal; transmitting the feedback signal to a signal processing unit where a working signal is produced; transmitting the working signal to a first signal control unit where a first control voltage is produced; transmitting the first control voltage to a second signal control unit where a second control voltage is produced and the second control voltage is a fixed voltage; and transmitting the second control voltage to an automatic gain control (AGC) unit.