Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2006-10-07
2010-02-23
Vu, Bao Q (Department: 2838)
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
C323S283000
Reexamination Certificate
active
07667443
ABSTRACT:
Techniques for near zero light-load supply current in switching regulators are described. In one aspect a voltage regulator operating a normal mode is generating an error signal indicating a difference between the output and the regulated voltage. A control signal, at least in part based on the error signal, actively controls the output of the regulator. The control signal is monitored over a period of time. The monitoring activates a signal indicating when the control signal is inactive for the period of time indicating a light-load condition. The voltage regulator is then placed in a standby mode when the signal is active and the error signal indicates the output is substantially at the regulated voltage. Portions of the voltage regulator are then disabled permitting the voltage regulator to operate at the minimum current draw.
REFERENCES:
patent: 5999421 (1999-12-01), Liu
patent: 6294904 (2001-09-01), Hirst
patent: 2003/0222629 (2003-12-01), Inoue et al.
patent: 2005/0046399 (2005-03-01), Gan et al.
patent: 2005/0258811 (2005-11-01), Matsuo et al.
Gray Richard Landry
Huynh Steven
Active-Semi, Inc.
Imperium Patent Works
Spano Joseph S.
Tran Nguyen
Vu Bao Q
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