Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Patent
1996-05-30
1998-11-17
Riley, Shawn
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
323280, 323268, G05F 140
Patent
active
058381457
ABSTRACT:
The fast transient load corrector is a circuit that attaches to the output terminals of a switching converter. Requiring no feedback circuit that interacts with any control parameter of the switching regulator, the fast transient load corrector works independently to improve the transient response of any switching regulator. Effectively the fast transient load corrector combines with the actual load to form a slowly varying composite load which permits the switching converter to maintain a well regulated output voltage or a voltage of pre-defined waveform. The conceptual construction consists of a bi-directional controlled current source and either a voltage sensor or a current sensor. The voltage or current sensor measures the amount of load disturbance and triggers the bi-directional controlled current source to supply transient current to the load. The quantity to be sensed can be the output voltage, the rate of change of the output voltage, or the rate of change of the output current. A practical construction, in the case of voltage sensing, consists of a pair of comparators which determine the deviation of the output voltage from the nominal value and trigger the action of the bi-directional controlled current source to supply transient current to the load. A practical construction, in the case of current sensing, consists of a negative feedback operational amplifier which, with a first-order circuit and sensing resistor, limits the rate of change of the output current and triggers the action of the bi-directional controlled current source to supply transient current to the load.
REFERENCES:
patent: 4218647 (1980-08-01), Haas
patent: 5220272 (1993-06-01), Nelson
patent: 5502370 (1996-03-01), Hall et al.
Poon Franki Ngai Kit
Tse Chi Kong
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