Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Patent
1995-09-29
1997-07-15
Wong, Peter S.
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
323280, 330109, G05F 140, G05F 144, H03F 136, H03F 352
Patent
active
056487185
ABSTRACT:
A voltage regulator with load pole stabilization is disclosed. The voltage regulator consists of an error amplifier, an integrator which includes a switched capacitor, a pass transistor, and a feed back circuit. In one embodiment, the integrator circuit includes an amplifier, a capacitor, and a switched capacitor which is driven by a voltage controlled oscillator. The voltage controlled oscillator changes its frequency of oscillation proportional to the output current. In another embodiment, the switched capacitor is driven by a current controlled oscillator whose frequency of oscillation is also proportional to the output current of the voltage regulator. When the output current demand is large, the controlled oscillators increase the frequency which decreases the effective resistance of the switched capacitor thereby changing the frequency of the zero to respond to the change in the load pole. Conversely, the effective resistance is increased as the current demand is decreased, also to respond to the decrease in load pole. Consequently, the disclosed voltage regulator has high stability without consuming excess power.
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Carlson David V.
Galanthay Theodore E.
Jorgenson Lisa K.
SGS-Thomson Microelectronics Inc.
Vu Bao Q.
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