Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2005-08-23
2005-08-23
Patel, Rajnikant B. (Department: 2838)
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
C363S065000
Reexamination Certificate
active
06933709
ABSTRACT:
A power supply comprises at least one power switch adapted to convey power between input and output terminals of the power supply, and a digital controller adapted to control operation of the at least one power switch responsive to an output measurement of the power supply. The digital controller comprises an analog-to-digital converter providing a digital error signal representing a difference between the output measurement and a reference value, a digital filter providing a digital control output based on a sum of previous error signals and previous control outputs, an error controller adapted to modify operation of the digital filter upon an error condition, and a digital pulse width modulator providing a control signal to the power switch having a pulse width corresponding to the digital control output. A method for controlling the power supply comprises the steps of receiving an output measurement of the power supply, sampling the output measurement to provide a digital error signal representing a difference between the output measurement and a reference value, filtering the digital error signal to provide a digital control output based on a sum of previous error signals and previous control outputs, modifying operation of the filtering step upon an error condition, and providing a control signal to the at least one power switch, the control signal having a pulse width corresponding to the digital control output.
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O'Melveny & Myers LLP
Patel Rajnikant B.
Power-One Limited
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