Download eca voltage multipliers

UNIT – 6
VOLTAGE REGULATORS
VOLTAGE MULTIPLIERS
• Voltage multipliers are used to step up the output voltage
level to two or more times the peak voltage of input.
• The various voltage multiplier circuits are:
Voltage Doubler
Voltage Tripler
Voltage Quadrapler
Voltage Doublers
• A voltage doubler provides an output that is twice
its peak input voltage.
• Half wave Voltage Doubler
• Full wave voltage Doubler
Half wave Voltage Doubler
Operation
• During Positive Half cycle of input:
• D1 forward biased
• D2 reverse biased
• Capacitor C1 will charged to Vm
Operation
• During negative half cycle of input:
• D1 reverse biased
• D2 forward biased
• Capacitor C2 gets charged.
• Voltage across C1 remain as Vm.
Contd…..
FULL WAVE VOLTAGE DOUBLER
CONTD……..
• During positive half cycle:
• D1 forward biased.
• Capacitor C1 charges to Vm
Contd….
• During negative half cycle:
• D2 forward biased.
• Capacitor C2 charges to Vm
Contd…..
Voltage Tripler
Operation
• During first positive cycle:
• D1 forward biased.
• D2, D3 reverse biased.
• C1 charges to Vm
Contd…..
• During next negative half cycle:
• D2 forward biased.
• C1 will holds entire charge and voltage remains as Vm.
• C2 charges to 2Vm
Contd…
Contd…..
• In next positive half cycle:
• C2 retains voltage 2Vm
• C1 retains voltage Vm.
• D3 is forward biased.
• D1, D2 reverse biased.
• C3 charges to 2Vm.
Contd….
Voltage Quadrupler