Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2005-02-01
2005-02-01
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
06850046
ABSTRACT:
A switched mode 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 parameter of the power supply. The digital controller comprises an analog-to-digital converter providing a digital error signal representing a difference between the output parameter and a reference value, a digital filter providing a digital control output based on a sum of current and previous error signals and previous control outputs, the error signals comprising integers having a relatively low numerical range and said control outputs comprising integers having a relatively high numerical range, and a digital pulse width modulator providing a control signal to the power switch having a pulse width corresponding to the digital control output. The digital filter further comprises an asymmetric arithmetic unit adapted to combine the low range integers with the high range integers.
REFERENCES:
patent: 5349523 (1994-09-01), Inou et al.
patent: 6194883 (2001-02-01), Shimamori
O'Melveny & Myers LLP
Patel Rajnikant B.
Power-One Limited
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