Creating additional phase margin in the open loop gain of a...

Details Creating additional phase margin in the open loop gain of a... Creating additional phase margin in the open loop gain of a...

2007-06-18

2010-02-02

Han, Jessica (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S274000, C323S285000

Reexamination Certificate

active

07656139

ABSTRACT:
A low-dropout voltage (LDO) regulator that creates a zero in the open loop gain using a relatively small-sized current control element to divert part of the supplied load current through a “zero” resistor before adding it to the output load. The main part of the output load is passed through a relatively large second current control element. A control signal generated by an error amplifier (e.g., an op-amp) is used to control the small current control element, but is passed through a boost zero compensating resistor before being applied to the large current control element. The voltage signal developed across the “zero” resistor mimics the magnitude and phase of a zero in the loop. This voltage signal is added to the loop gain by, for instance, using a bypass capacitor, and the resulting feedback signal is supplied to the error amplifier.

REFERENCES:
patent: 4779037 (1988-10-01), LoCascio
patent: 5686821 (1997-11-01), Brokaw
patent: 6373233 (2002-04-01), Bakker et al.
patent: 6603292 (2003-08-01), Schouten et al.
patent: 6765374 (2004-07-01), Yang et al.
patent: 6861827 (2005-03-01), Yang et al.
patent: 6861832 (2005-03-01), Perez
patent: 2001/0024140 (2001-09-01), Taylor
patent: 2005/0057234 (2005-03-01), Yang et al.
patent: 64-065610 (1989-03-01), None
patent: 2002-032133 (2002-01-01), None

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