Electricity: power supply or regulation systems – In shunt with source or load – Using a three or more terminal semiconductive device
Reissue Patent
2011-01-18
2011-01-18
Vu, Bao Q (Department: 2838)
Electricity: power supply or regulation systems
In shunt with source or load
Using a three or more terminal semiconductive device
C323S284000, C323S288000, C323S907000
Reissue Patent
active
RE042037
ABSTRACT:
A current-sensing and correction circuit having programmable temperature compensation circuitry that is incorporated into a pulse width modulation controller of a buck mode DC—DC converter. The front end of the controller contains a sense amplifier, having an input coupled via a current feedback resistor to a common output node of the converter. The impedance of a MOSFET, the current through which is sampled by a sample and hold circuit is controlled by the sense amplifier unit. A sensed current correction circuit is coupled between the sample and hold circuit and the controller, and is operative to supply to the controller a correction current having a deterministic temperature-compensating relationship to the sensed current. The ratio of correction current to sensed current equals a value of one at a predetermined temperature, and has other values at temperatures other than at that temperature.
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Fogg & Powers LLC
Intersil America's Inc.
Vu Bao Q
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