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 ALTERNATIVE NAMES:
1) VOLTAGE DOUBLER
2) DC RESTORERS
3) CLAMPED CAPACITORS
 TYPICALLY, CLAMPER CIRCUITS USE A COMBINATION
OF DIODES, CAPACITORS, AND SOMETIMES RESISTORS TO
ACHIEVE THIS EFFECT.
THE POSITIVE CLAMPER WORKS AS FOLLLOWS:
• +VE CYCLE => CAPACITOR CHARGES
• -VE CYCLE => CAPACITOR DISCHARGES
HENCE THE OUTPUT SIGNAL IS CALCULATED AS:
VIN – VOUT + VM = 0
VM – VOUT + VM = 0
VOUT = 2VM
SO THE OUTPUT SIGNAL SHIFTS UPWARDS (ABOVE +VE X – AXIS ).
SIMILAR TO THE POSITIVE CLAMPER THE CAPACITOR CHARGES IN THE POSITIVE
CYCLE WHILE DISCHARGING SUBSEQUENTLY IN THE NEGATIVE CYCLE. THE MAIN
DIFFERENCE OCCURS IN THE WAVEFORM DUE TO THE DIODE’S PLACING IN THE
CIRCUIT.
THE OUTPUT IS CALCULATED ASFOLLLOWS:
VIIN + VOUT + VM = 0
VM + VOUT +VM =0
VOUT = - 2VM
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