Electricity: power supply or regulation systems – Self-regulating – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2005-08-09
2005-08-09
Berhane, Adolf (Department: 2838)
Electricity: power supply or regulation systems
Self-regulating
Using a three or more terminal semiconductive device as the...
C323S315000
Reexamination Certificate
active
06927559
ABSTRACT:
Disclosed is a constant voltage power supply, which comprises an error amplifier VEA including a transistor M3,and a transistor M4having the same ratio between channel width and channel length as that of the transistor M3.The gate and source of the transistor M4are connected to the gate of a transistor M3to form a current mirror circuit in conjunction with the transistor M3.Further, the drain of the transistor M4is connected with a transistor M5adapted to be switched in response to an external control signal Sg. For example, when the transistor M5is in ON state, any signal amplification function of the transistor M3is vanished away, and the gain of the error amplifier VEA is lowered. The circuit configuration for changing the gain of the error amplifier VEA makes it possible to strike a balance between high-speed response characteristic in an active mode and operational stability in a sleep mode, and reduce a circuit area required for being formed on an integrated circuit.
REFERENCES:
patent: 5404096 (1995-04-01), Thiel
patent: 5596265 (1997-01-01), Wrathall et al.
patent: 6034518 (2000-03-01), Yuasa
patent: 6066944 (2000-05-01), Sakurai
patent: 6369554 (2002-04-01), Aram
patent: 6559626 (2003-05-01), Horie
patent: 62-210724 (1987-09-01), None
patent: 09-107253 (1997-04-01), None
patent: 2000-013161 (2000-01-01), None
patent: 2001-117650 (2001-04-01), None
patent: 2001-222331 (2001-08-01), None
Tanigawa Hiroshi
Yamane Satoru
Berhane Adolf
Cohen & Pontani, Lieberman & Pavane
Toko Inc.
LandOfFree
Constant voltage power supply does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Constant voltage power supply, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constant voltage power supply will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3487562