Receiving Circuit adopts the zero-IF, only consists of the mixer, differential amplifiers and voltage comparator, compared to super heterodyne, obviously simplifies the structure of the circuit;
接收电路采用了零中频方式，相对于超外差方式，明显简化了电路结构，仅由混频器、差分放大器和电压比较器组成；
Receiving Circuit adopts the zero-IF, only consists of the mixer, differential amplifiers and voltage comparator, compared to super heterodyne, obviously simplifies the structure of the circuit;
接收电路采用了零中频方式，相对于超外差方式，明显简化了电路结构，仅由混频器、差分放大器和电压比较器组成；
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