Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2007-06-28
2010-12-28
Patel, Rajnikant B (Department: 2838)
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
C363S021010
Reexamination Certificate
active
07859237
ABSTRACT:
A voltage to current converter that can provide multiple current sources at differing voltage levels using a single inductor, without the need to provide a current sense element, pass element, and wiring to provide feedback for load current regulation. A switching inductor current is regulated such that the average current supplied by the inductor is equal to a user determined set point or points for a set of multiplexed loads. The inductor current levels are sampled and stored, and the average current level for each load is determined based on the sampled current levels. The average current levels are compared to a current level set point or set point signals to determine an error signal for each load current. The error signal for each current is amplified and filtered to provide duty cycle control terms. The duty cycle control terms are converted to pulse width modulated control signals by a pulse width modulator. The pulse width modulated control signals control the duration of switch states to energize and discharge the inductor to provide regulated average current levels to the multiple load channels.
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Brady W. James
Patel Rajnikant B
Shaw Steven A.
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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