The demodulator ts based on a Type TDA8341 chip, which is the successor of the weIl-known Types TDA2541 and TDA3541. Apart from a demodulator, the chip contains an AGC (automatic gain control) section for tuners whose AGC voltage is directly proportional to the gain, and an AFC (automatic frequency control) facility. In the present design, the AFC is used merely as a tuning Indicator.
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