UL2242 car radio circuit
Source: InternetPublisher:萌面大虾 Keywords: car radio Updated: 2023/12/06
The figure shows a car radio circuit with the ULN-2242A intermediate frequency amplifier integrated circuit as the core. Switching between amplitude modulation and frequency modulation is achieved through the switch S. Another input loop scheme and its equivalent circuit are shown on the lower left. In the figure, UE1 is FM input signal, UA1 is the low-frequency output signal, A1 is connected to the FM circuit, A2 is connected to the intermediate frequency amplifier, and A3 is connected to the FM automatic gain control circuit.
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