Electricity: power supply or regulation systems – In shunt with source or load – Using choke and switch across source
Reexamination Certificate
2008-05-27
2008-05-27
Vu, Bao Q. (Department: 2838)
Electricity: power supply or regulation systems
In shunt with source or load
Using choke and switch across source
C323S282000, C323S284000, C323S285000
Reexamination Certificate
active
07378822
ABSTRACT:
A slope compensation circuit that provides slope compensation in a switching regulator is provided. The slope compensation circuit preferably is adapted to receive an oscillator pulse train from a pulse width modulator oscillator and a modulator pulse train from a pulse width modulator. The circuit preferably includes a feedback loop that is responsive to the oscillator pulse train. The circuit preferably provides a slope compensation pulse train of ON and OFF states that is responsive in part to the feedback loop and in part to the pulse width modulator switch pulse train. The invention preferably achieves lower maximum slope compensation current by incorporating an analog feedback loop in the PWM system to start slope compensation preferably only slightly ahead of PWM switch-OFF. This preferably occurs independent of the PWM duty cycle.
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Linear Technology Corporation
McDermott Will & Emery LLP
Vu Bao Q.
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