Electronic instrument having booster circuit

Details Electronic instrument having booster circuit Electronic instrument having booster circuit

2007-09-25

2007-09-25

Nguyen, Matthew V. (Department: 2838)

Electric power conversion systems

Current conversion

With voltage multiplication means

C323S271000

Reexamination Certificate

active

11141875

ABSTRACT:
Provided is an electronic instrument in which a starting voltage of a power supply is less than a starting voltage of a general booster circuit, and which is capable of starting efficiently. The electronic instrument includes: a power supply for supplying power; a first booster circuit that is started with the power from the power supply; a capacitor for storing power of the first booster circuit; a second booster circuit that is started with the power in the capacitor; a load circuit operating with power of the second booster circuit; a voltage detection circuit for detecting a voltage of the capacitor; and a switching element controlled by a voltage detection signal, in which, when determining that the voltage of the capacitor is a predetermined voltage or more, the voltage detection circuit turns off the switching element and starts the second booster circuit with the power of the capacitor.

REFERENCES:
patent: 5365305 (1994-11-01), Seki et al.
patent: 6459330 (2002-10-01), Yasue
patent: 7129679 (2006-10-01), Inaba et al.
patent: 7180275 (2007-02-01), Reithmaier

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