Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Rectangular or pulse waveform width control
Reexamination Certificate
2005-08-16
2005-08-16
Cunningham, Terry D. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Rectangular or pulse waveform width control
C327S198000, C327S031000, C323S274000, C323S288000
Reexamination Certificate
active
06930526
ABSTRACT:
Devices, circuits, and methods generate a substantially constant output voltage. A power storage element generates a DC output voltage from an input voltage. The output is sampled to generate a feedback signal. An error amplifier generates an error signal from the feedback signal and a reference voltage. A ramp generator generates a ramp signal from the error signal. A comparator generates a pulse signal by comparing the ramp signal to a threshold voltage. The pulse signal is used to control a power switch, which switches the power storage element on and off. The pulse signal is generated such that, if the input voltage changes within a certain range, a width of its pulses changes so as to maintain the output voltage substantially constant.
REFERENCES:
patent: 5382918 (1995-01-01), Yamatake
patent: 5399958 (1995-03-01), Iyoda
patent: 5514947 (1996-05-01), Berg
patent: 5754414 (1998-05-01), Hanington
patent: 6232755 (2001-05-01), Zhang
patent: 6259613 (2001-07-01), Lee et al.
Kazimierczuk, Marian K., et al. “Feedforward Control of DC-DC PWM Boost Converter”, IEEE Transactions on Circuits and Systems—I: Funamental Theory and Applications, vol. 44, No. 2, Feb. 1997, pp. 143-148.
Calderoni, L., et al. “Optimal Feed-Forward Compensation for PWM DC/DC Converters”, IEEE Transactions on Power Electronics, vol. 7, No. 2, Apr. 1992.
Arbetter, Barry, et al. “Feedforward Pulse Width Modulators for Switching Power Converters”, IEEE Transactions on Power Electronics, vol. 12, No. 2, Mar. 1997, pp. 361-368.
Cunningham Terry D.
Darby & Darby PC
Luu An T.
National Semiconductor Corporation
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