Ultrasonic knife output voltage and current phase difference acquisition circuit

The utility model discloses an ultrasonic knife output voltage and current phase difference acquisition circuit, which comprises an output current sampling monitoring output circuit and an output voltage sampling monitoring output circuit which are respectively used for acquiring output voltage and output current, the acquisition logic is similar, and a sampling transformer is arranged on the output circuit. The output current and the output voltage are scaled according to the proportion of 10: 1 and then amplified by three times through the operational amplifier, and the scaled sine alternating current signal passes through the comparator to output square waves with the same frequency. Phases of an output power supply and current can be monitored in real time, a phase difference is calculated, the frequency of the output current is adjusted according to the phase difference, and an ultrasonic knife system is always in a resonance state. 本实用新型公开了一种超声刀输出电压与电流相位差采集电路，包括输出电流采样监控输出电路和输出电压采样监控输出电路，分别采集输出电压与输出电流，采集