Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2007-09-11
2007-09-11
Berhane, Adolf (Department: 2838)
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
Reexamination Certificate
active
10891811
ABSTRACT:
A voltage regulator includes a first and second amplifier stage, an output stage, and a variable zero circuit. The first amplifier stage is coupled to receive a reference voltage and introduces a first pole of the voltage regulator. The second amplifier stage is coupled to the first amplifier stage and introduces a second pole of the voltage regulator. The output stage is coupled to the second amplifier stage, has an output driver, and is coupled to provide an output voltage based on the reference voltage. The variable zero circuit is coupled to the first amplifier stage, the second amplifier stage, and the output stage. The variable zero circuit provides a zero to compensate for at least one of the first pole or the second pole of the voltage regulator based on a gate to source voltage of the output driver and a drain to source voltage of the output driver.
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patent: 6977490 (2005-12-01), Zhang et al.
patent: 2002/0105382 (2002-08-01), Kadanka
Kase Kiyoshi
Len May
Berhane Adolf
Chiu Joanna G.
Freescale Semiconductor Inc.
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