Wireless headphone circuit
Source: InternetPublisher:拳制龙 Keywords: Wireless headphones electromechanical Updated: 2020/11/04
Circuit working principle: The receiving circuit is shown in Figure a. KA22429 is a
16-pin dual-row flat package miniature FM receiver dedicated integrated circuit . Channel selection can be achieved by changing
the local oscillator circuit on pins 4 and 5. There is a transfer switch between pins 4 and 5. When it is turned off,
it is the FM radio, and when it is turned on, it is the RE receiver.
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