Bootstrap line power supply regulator with no filter capacitor

Details Bootstrap line power supply regulator with no filter capacitor Bootstrap line power supply regulator with no filter capacitor

1996-06-27

1998-10-06

Wong, Peter S.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323224, 327377, G05F 144

Patent

active

058182098

ABSTRACT:
A power supply regulator comprising a regulated-voltage source; a buffer connected to the voltage source; and a diode connected to the output of the buffer. A bootstrap capacitor is located between the diode and the output of a power stage; and the output of the power stage is switched between a low and a high value by a digital signal also supplied to the input of the buffer which therefore generates a switched regulated output voltage varying between a first value equal to the regulated voltage and a second lower value. The switched regulated voltage switches from the first to the second value before the output of the power stage switches to high, thus immediately disabling the diode and preventing current spikes due to minority carriers in the diode from being transmitted to the regulated-voltage source. The switched regulated voltage switches from the second to the first value before the output of the power stage switches to low, to permit charging of the bootstrap capacitor to the regulated voltage when the output is low.

REFERENCES:
patent: 3714466 (1973-01-01), Spence
patent: 4922249 (1990-05-01), Cointot et al.
patent: 4989127 (1991-01-01), Wegener
patent: 5111084 (1992-05-01), Suko
patent: 5138200 (1992-08-01), Barsanti et al.
patent: 5373435 (1994-12-01), Jayaraman et al.
patent: 5627460 (1997-05-01), Bazinet et al.
European Search Report from European Patent Application No. 95830283.8 filed Jun. 30, 1995.

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