Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Slope control of leading or trailing edge of rectangular or...
Reexamination Certificate
2007-08-21
2007-08-21
Patel, Rajnikant B. (Department: 2838)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Slope control of leading or trailing edge of rectangular or...
C323S282000, C363S015000
Reexamination Certificate
active
11080327
ABSTRACT:
A switch mode power converter is provided which includes a switching cell with a supply input, an output and a control input. A summing comparator has first and second differential input pairs and an output. The output is connected to the control input of the switching cell. An oscillator provides a periodic waveform that is applied to a first one of the inputs of the first differential input pair of the summing comparator. An adjustable reference voltage source provides an adjustable reference voltage a predetermined fraction of which is applied to a second one of the inputs of the first differential input pair of the summing comparator. An error amplifier has differential outputs coupled to the second pair of differential inputs of the summing comparator and a differential input pair. A first input of the differential input pair is coupled to the output of the switching cell, and the adjustable reference voltage from the adjustable reference voltage source is applied to a second input of the differential input pair. Thus, the desired DC voltage is scaled to produce a DC reference for the comparator which generates the desired duty cycle for the pulse signal that drives the switching cell, and thus the desired regulated output voltage, with only minor corrections required across the error terminals to correct small parasitic terms.
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Mattingly “Designing Stable Compensation Networks for Single Phase Voltage Mode Buck Regulators” In: Technical Brief TB417.1, Dec. 2003.
Gibson Neil
Kirchner Joerg
Scoones Kevin
Brady III Wade J.
Patel Rajnikant B.
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