Unit – 6 voltage regulators

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Presentation transcript:

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 D3 is forward biased. D1, D2 reverse biased. C3 charges to 2Vm.

Contd….

Voltage Quadrupler

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