The CXA1019S chip is used to complete the design of the receiver mixing, intermediate frequency amplifier, demodulation, etc., and the chip BU2614 is used to generate a stable local oscillator and control the resonant frequency of the input tuning loop by PLL frequency synthesis, thereby realizing electrical tuning. The single-chip microcomputer uses the MCS-51 series to control the frequency synthesizer BU2614, and with the keyboard, display and memory circuit, it can realize a variety of program-controlled search, radio station storage and other functions.
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