Current control circuit used for voltage booster circuit

Details Current control circuit used for voltage booster circuit Current control circuit used for voltage booster circuit

2008-03-06

2009-06-02

Donovan, Lincoln (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C326S087000, C363S060000

Reexamination Certificate

active

07541860

ABSTRACT:
When a low level voltage is inputted to an input terminal IN, a transistor EF1enters a blocked state, a first switch circuit SW1enters a conduction state, and a second switch circuit SW2enters the blocked state. Accordingly, a boosted voltage outputted from a voltage booster circuit CP is applied to a load R. When a high level voltage is inputted to the input terminal IN, the transistor EF1enters the conduction state, the first switch circuit SW1enters the blocked state, and the second switch circuit SW2enters the conduction state. Accordingly, a voltage equivalent to that at the external power supply terminal VDD is applied to the load R. Therefore, although a current constantly flows through the transistor EF1when the boosted voltage is not required, such situation does not affect a current supplied from the voltage booster circuit CP.

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