Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Patent
1996-05-09
1997-11-11
Berhane, Adolf
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
323280, G05F 1575
Patent
active
056868219
ABSTRACT:
A single-loop voltage regulator controller includes a high-gain transconductance amplifier that accommodates common mode inputs as low as its negative supply rail. The input stage of the amplifier produces a proportional to absoulte temperature (PTAT) input offset voltage. The transconductance amplifier's inverting input is connected to the circuit common, or negative supply rail, and a tap from a feedback network is connected to the amplifier's noninverting input. The feedback network provides, at this tap, a PTAT measure of the regulator's regulated output. The amplifier's output is connected to drive a noninverting driver which, in turn, is connected to drive the control terminal of the regulator's pass transistor. A compensation capacitor connected between the amplifier's output and the regulated output terminal ensures the regulator's stability even for relatively low level load impedances.
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James E. Solomon, "The Monlithic Op Amp:A Tutorial Study", IEEE Journal of Solid State Circuits, vol. SC-9, Dec. 1974, pp. 314-332.
Analog Devices Inc.
Berhane Adolf
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