AmplifierCircuits

General Description: The TDA9821 is a monolithic, integrated, TV FM intercarrier sound demodulator for all FM standards. The circuit contains two separate FM demodulators using Phase Locked Loop (PLL) reference frequency generation. The circuit requires a minimum number of  external components. Circuit Diagram: Dual channel TV FM intercarrier sound demodulator Datasheet for TDA9821:   Download

General Description: The TDA 7511 is a high performance tuner circuit for AM/FM car radio. It contains mixers, IF amplifiers, demodulators for AM and FM, quality detection, ISS filter and PLL synthesizer with IF counter on a single chip. Circuit Diagram: CIRCUIT DIAGRAM AM/FM TUNER FOR CAR RADIO AND HIFI APPLICATIONS Datasheet for TDA7511:   Download