clipper clamper

i want to design a circuit usind zener diode which can clip as well as clamp simultaneously any suggestion for the circuit

by anushthan
October 27, 2017

1 Answer

Answer by mikerogerswsm

Use an opamp in the inverting configuration, and put the zener across the feedback resistor. This will clip when the zener is reverse-biased (as zeners normally are) and clamp when the zener is forward-biased. If a really accurate 0V clamp is required, feed about 0.6V to the opamp non-inverting input. To reduce temperature dependence, take most of this 0.6V from a forward-biased diode or transistor. Hope this helps.

+2 votes
by mikerogerswsm
October 27, 2017

A simpler circuit is just to take the signal though 10k to the zener, with the other end to earth. Take the output from across the zener. This will clip at zener voltage and clamp to about 0.6V the other way. Again, if a more accurate clamp is required, apply approx 0.6V instead of ground to the 'low' of the zener.

by mikerogerswsm
October 30, 2017

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