Power supply apparatus, and image forming apparatus having...

Details Power supply apparatus, and image forming apparatus having... Power supply apparatus, and image forming apparatus having...

2006-01-20

2008-09-16

Schuberg, Darren (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

Reexamination Certificate

active

07425789

ABSTRACT:
A power supply apparatus includes a piezoelectric transformer which outputs a voltage, a voltage-controlled oscillator which controls the frequency of an output signal in accordance with an input control signal, a power supply voltage supply element which is driven by a signal output from the voltage-controlled oscillator and applies a power supply voltage to the piezoelectric transformer, and an output voltage stop circuit (118) which outputs a signal for stopping driving the piezoelectric transformer on the basis of a control signal (Vcont).

REFERENCES:
patent: 5654605 (1997-08-01), Kawashima
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patent: 6107620 (2000-08-01), Shiba et al.
patent: 6229721 (2001-05-01), Mano et al.
patent: 7122939 (2006-10-01), Chou et al.
patent: 2006/0220495 (2006-10-01), Yamaguchi et al.
patent: 2006/0222398 (2006-10-01), Nagasaki et al.
patent: 11-206113 (1999-07-01), None

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