Novel aviation frequency band receiving circuit

The invention discloses an aviation frequency band receiving circuit. A single-chip multiband frequency modulation and amplitude modulation receiving circuit is added on the basis of a VHF band interphone, thereby not only having standard interphone functions, but also being a standard four-band radio, and high-frequency standard aviation signals can even be received on the basis of all original functions by means of a short waveband receiving function in the four-band radio and via comprehensive utilization of VHF136-174MHz narrowband frequency synthesis circuits. The aviation frequency band receiving circuit disclosed by the invention has the characteristics of simple circuit and powerful functions, can be used as a shortwave radio receiver and can also receive standard aviation signals within the range of 118-135.975MHz, and is high in sensitivity, good in receiving selectivity and strong in anti-interference ability. 本发明公开了种航空频段接收电路，其在VHF段对讲机的基础上，增加单芯片多波段调频调幅接收电路，不仅具有标准的对讲机功能，而且是台标准四波段收音机，利用四波段收音机中的短波段接收功