Voltage Clamping Diode. Transient voltage suppressor diode is a clamping device so whenever the induced voltage exceeds the avalanche breakdown voltage it absorbs the excess energy of the overvoltage event and then it automatically resets after overvoltage condition. The output will always receive a voltage which is dependent on the rating of zener diode.
As the diode becomes forward biased current flows through the amplifier s inputs to the respective supply. A diode clamping circuit may be used to limit the output voltage to a particular range. The first circuit is a diode clamper circuit that clamps a signal above the 0v railing making the entire signal positive.
This circuit is also called a limiter and is typically used to provide protection to a large amplifier such as a high gain op amp circuit as shown.
So the trough the peak of the bottom of the signal will be at 0v. In the diagram the input signal is not allowed to rise above 0 7 v or to drop below 0 7 v. A clamping diode helps protect sensitive electronic components in the vehicle from damage. The trough of the signal will be on the 0v line.
