Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Rectangular or pulse waveform width control
Reexamination Certificate
2006-02-21
2006-02-21
Nguyen, Minh (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Rectangular or pulse waveform width control
C327S299000
Reexamination Certificate
active
07002386
ABSTRACT:
A self-adjusting PWM regulator which minimizes undershoot and overshoot conditions is disclosed. The regulator includes a charge pump, a voltage comparator circuit, and a latch circuit. The input of the voltage comparator circuit includes an output of the charge pump. The input of the latch circuit includes an output from the voltage comparator circuit. The latch circuit includes a pair of SR latches coupled to a pair of AND/OR gates. The latch circuit transmits a first signal to the charge pump to prevent an overshoot condition if the output from the voltage comparator circuit is in a first state, and transmits a second signal to prevent an undershoot condition if the output from the voltage comparator circuit is in a second state. This keeps the charge pump adjusted within the limits of its control.
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Atmel Corporation
Nguyen Minh
Sawyer Law Group LLP
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