Programmable feedback voltage pulse sampling for switched...

Electric power conversion systems – Current conversion – With condition responsive means to control the output...

Reexamination Certificate

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C363S021130, C363S021160

Reexamination Certificate

active

07471531

ABSTRACT:
Disclosed is a method and apparatus that includes a power supply having a primary coil and a secondary coil. The secondary coil generates an output voltage and a feedback voltage related to the output voltage. The feedback voltage is sampled at a time instant that is digitally controllable. The output voltage is determined from the feedback voltage.

REFERENCES:
patent: 7061780 (2006-06-01), Yang et al.
patent: 2006/0034102 (2006-02-01), Yang et al.
L. Balogh, “A Practical Introduction to Digital Power Supply Control”, Texas Instruments Incorporated, 2005, pp. 6-1 through 6-29. Downloaded from: http://focus.ti.com/lit/ml/slup232/slup232.pdf, Apr. 5, 2006.
L. Dixon, “Control Loop Cookbook”, Texas Instruments Incorporated, 2002, pp. 5-1 through 60. Downloaded from: http://focus.ti.com/lit/ml/slup113a/slup113a.pdf, Apr. 5, 2006.
K. Kittipeerachon, et al., “Feedback Compensation Design for Switched Mode Power Supplies with a Right-Half-Plane (RHP) Zero”, Power Electronics, Machines and Drives, 2004, (PEMD) 2004. Second International Conference on (Conf. Publ. No. 498), pp. 236-241.
Y-F. Liu, et al., “Digital Control of Switching Power Converters”, Proc. of IEEE Conference on Control Applications, Toronto, Canada, Aug. 28-31, 2005, pp. 635-640.
A. Peterchev, et al., “Quantization Resolution and Limit Cycling in Digitally Controlled PWM Converters”, IEEE Trans. on Power Electronics, vol. 18, No. 1, Jan. 2003, pp. 301-308.
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“Introduction to Power Supplies”, National Semiconductor Application Note 556, Sep. 2002, pp. 1-7. Downloaded from: http://www.efficientpowersupplies.org/pages/into—power—supplies.pdf, Apr. 5, 2006.

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