Signal receiving and modulating circuit for intelligent equipment

The utility model discloses a signal receiving and modulating circuit for intelligent equipment. The system comprises a signal detection module, a signal conversion module, an anti-interference module, a signal modulation module and a control output module, a diode D1 in the signal detection module controls the output direction of a received signal, and a capacitor C1 and a resistor R4 form a series storage signal circuit to filter redundant frequency bands; a capacitor C2 and a diode D3 in the signal conversion module store the converted signals to prevent data loss, and a triode Q1 controlson-off of the signals; a triode Q2 in the anti-interference module serves as a contactless switch to filter a path and received redundant signals through a base electrode end; an inductor L1 and an inductor L2 in the signal modulation module provide stored charges for the modulation module to maintain the stability of affected signal output; a trimming resistor R17 in the control output module canbe adjusted according to