Clampers

[mohdfasieh]

Can any genius tell me about Clampers.I am not able to understand it's working.

[Jeff273]

You mean like a diode clamp on a power line?

[mohdfasieh]

yes But plz tell me the working of Clampers

[Jeff273]

A diode clamp works by limiting the voltage to one diode drop above the clamp voltage, typically you want to protect the input to a sensitive device.

http://www.physicsforums.com/attachment.php?attachmentid=3340&stc=1

While Vin is below about 5.7V Vout will match Vin since the diode is reverse biased. With Vin above 5.7V the diode will become forward biased (i.e. it will conduct) and limit Vout to approx 5.7V. There are other passive clamp configurations but the idea is the same.