Electricity: power supply or regulation systems – In shunt with source or load – Using choke and switch across source
Reexamination Certificate
2007-11-20
2007-11-20
Riley, Shawn (Department: 2838)
Electricity: power supply or regulation systems
In shunt with source or load
Using choke and switch across source
C323S284000
Reexamination Certificate
active
11362513
ABSTRACT:
The invention provides a DC-DC converter capable of being started up in a state in which an input voltage is low and capable of being structured without increasing a circuit size. A back-gate voltage (Vsb) is outputted from a back-gate voltage generating circuit (VBGN), and is inputted to a back gate of a transistor (FET1). During a period during which an output voltage (Vout) is lower than a reference voltage (e0), an oscillation signal (OS1) is inputted to a gate of the transistor (FET1), and the back-gate voltage (Vsb) is set at a grounded voltage. Therefore, the transistor (FET1) has a reference threshold voltage (Vto). On the other hand, during a period during which the output voltage (Vout) is higher than the reference voltage (e0), a pulse signal (PS) is inputted to the gate of the transistor (FET1), and the back-gate voltage (Vsb) is set at an output voltage of a charge pump portion (5). Therefore, the transistor (FET1) has a threshold voltage higher than the reference threshold voltage (Vto).
REFERENCES:
patent: 5422591 (1995-06-01), Rastegar et al.
patent: 7161333 (2007-01-01), Soch
patent: 1-295665 (1989-11-01), None
patent: 3-74169 (1991-03-01), None
patent: 8-186980 (1996-07-01), None
patent: 2001-251849 (2001-09-01), None
Hasegawa Morihito
Kasai Toshihiko
Ozawa Hidekiyo
Tajiri Shoji
Arent Fox LLP.
Fujitsu Limited
Riley Shawn
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