Schmitt trigger has two stable states, but different from general trigger, Schmitt trigger adopts potential trigger mode, and its state is maintained by input signal potential. Schmidt trigger has different threshold voltages for negative falling and positive rising input signals.
Schmidt trigger is a kind of shaping circuit, which can shape a voltage waveform with slow edge change into a rectangular pulse with steep edge. Compared with ordinary flip-flops. It has the following characteristics: (1) has two stable states, but it has no memory function, and the output state needs corresponding input voltage to maintain it.
Schmitt trigger composed of CMOS gates is shown in Figure 2. In the circuit, two CMOS inverters are connected in series, and the voltage divider RR2 feeds back the voltage at the output end to the input end, which affects the circuit.
Schmidt trigger circuit and its working principle are described in detail. Schmidt trigger is a kind of motor control circuit, which can automatically adjust the current of the motor when the motor is running to maintain the speed of the motor. Its working principle is to maintain the set speed of the motor by monitoring the speed of the motor and adjusting the current of the motor.