Feed-forward compensation for a hysteretic switching regulator

Details Feed-forward compensation for a hysteretic switching regulator Feed-forward compensation for a hysteretic switching regulator

2008-11-18

2010-11-16

Vu, Bao Q (Department: 2838)

Electricity: power supply or regulation systems

Input level responsive

C323S288000, C323S285000

Reexamination Certificate

active

07834608

ABSTRACT:
One embodiment of the invention includes a hysteretic power regulator system. The system includes a switching stage configured to periodically couple an input voltage to an inductor in response to a control signal to generate an output voltage. The system also includes a hysteretic control stage configured to generate the control signal based on a comparison of a feedback voltage associated with the output voltage and a predetermined reference voltage. The system also includes a feed-forward stage configured to generate a feed-forward ramp voltage in response to the control signal. The feed-forward ramp voltage can be added to the feedback voltage to set a frequency of the control signal. The system further includes a compensation stage configured to cancel a DC error associated with the feed-forward ramp voltage relative to the feedback voltage to substantially mitigate errors associated with the output voltage.

REFERENCES:
patent: 6661216 (2003-12-01), Grant et al.
patent: 7042203 (2006-05-01), Van Der Horn et al.
patent: 2004/0051510 (2004-03-01), Saggini et al.
patent: 2009/0058383 (2009-03-01), Ryoo
patent: 2009/0237049 (2009-09-01), Hachiya et al.

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