12V detection voltage conditioning circuit

Probe current voltage pin 420*4450 head diameter 5.0 over current current and voltage pin

TP-IP4220CZ6 5V 0.35PF breakdown voltage 6V SOT

Adjustable capacitor Murata genuine original

Shunuo varistor / ESD varistor / product complete / Sunlord first-class agent

Test - lowercase jpg

The signal conditioning circuit mainly performs filtering, voltage division and impedance matching on the input power detection signal. The purpose of filtering is to filter out high-frequency glitch in the detection signal. It can be seen through experiments that there is often a large amplitude interference glitch in the antenna power signal. If it is not filtered, it may cause damage to the device or affect the detection accuracy. The purpose of voltage division is to change the amplitude of the detection signal to meet the input requirements of the A/D converter. The key to the design is to ensure that the amplitude of the signal does not exceed the input requirements of A/D, and the signal should be increased as much as possible. Resolution. The impedance matching circuit is an emitter follower, which aims to perform impedance matching before and after, and improve the accuracy of detection. The figure shown is a conditioning circuit for the 12V detection voltage.