Amplitude modulation demodulator

The invention discloses an amplitude modulation demodulator. The amplitude modulation demodulator comprises an operational amplifier Q1 and an operational amplifier Q2, wherein a negative phase input end of the operational amplifier Q1 is connected with a demodulation signal input end through a resistor R1 and a capacitor C1, and connected with an output end of the operational amplifier Q1 through a resistor R2, a positive phase input end of the operational amplifier Q1 is connected with a power source through a resistor R3, and grounded through a capacitor C3 and a resistor R4 which are connected in parallel, a negative phase input end of the operational amplifier Q2 is connected with the output end of the operational amplifier Q1 through a resistor R5, a positive phase input end of the operational amplifier Q2 is respectively connected with one end of a resistor R7 and one end of a resistor R8 through a resistor R6, the other end of the resistor R7 is connected with the power source, the other end of the resistor R8 is grounded, and an output end of the operational amplifier Q2 is connected with a demodulation signal input end through a capacitor C2. The amplitude modulation demodulator is simple in structure, small in size, low in power consumption and strong in environmental adaptation.