agc loop design
agc loop design
(OP)
i need information about agc loop design in receiver.
thanks
thanks
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RE: agc loop design
RE: agc loop design
RE: agc loop design
A control voltage is center of this circuit it varies the i-f amplifier in an even linear fashion. AGC detection uses two types; audio derived and i-f signal derived. This detected signal is detected by a diode and stored on a capacitor with a bleed resistor, C stores the detected input as a voltage .The DC amp takes the detected voltage on the capacitor and buffers it and sends it back to the i-f amp. This control voltage acts so that an increase on C will decrease the V-G amp or a decrease on C will increase the V-G amp.
As designs can start simple and grow an audio derived AGC might be a good place start. If you sample the audio so that it can be seen on an anolog meter then consider how to keep the meter within the bounds of normal modulation.
RE: agc loop design
http://www.eecg.toronto.edu/~kphang/ece1352f/papers/martin_AGC.pdf
etc. for more info