Compensator to achieve constant bandwidth in a switching...

Details Compensator to achieve constant bandwidth in a switching... Compensator to achieve constant bandwidth in a switching...

2005-12-06

2005-12-06

Patel, Rajnikant B. (Department: 2838)

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

C363S080000, C363S097000, C323S285000

Reexamination Certificate

active

06972974

ABSTRACT:
A switching regulator includes a compensation circuit for applying a scaling factor to the loop gain of the feedback control loop of the regulator. In operation, the loop gain of the feedback control loop has a dependency on the input and output voltages of the switching regulator. The compensation circuit applies a function as the scaling factor where the function is a reciprocal function of the loop gain dependency on the input voltage and output voltage. In one embodiment, the loop gain has a dependency on the ratio VIN/VOUTand a scaling factor having a value indicative of the ratio VOUT/VINis applied by the compensation circuit. In one embodiment, the compensation circuit is coupled in series with the output circuit of an error amplifier in the feedback control loop of the regulator. In another embodiment, the compensation circuit is subsumed within the circuitry of the error amplifier.

REFERENCES:
patent: 6583609 (2003-06-01), Pardoen
patent: 6819011 (2004-11-01), Kernahan et al.
“Dual Mobile-Friendly PWM Controller with DDR Memory Option”, Intersil Data Sheet, Jan. 2002, pp. 1-18.

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