Negative voltage regulator

Details Negative voltage regulator Negative voltage regulator

2006-12-05

2006-12-05

Han, Jessica (Department: 2838)

Electricity: power supply or regulation systems

Self-regulating

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

C323S280000, C327S539000

Reexamination Certificate

active

07145318

ABSTRACT:
A first voltage divider includes a first resistor having a first resistance coupled to a positive voltage reference in series with a second resistor having a second resistance and coupled to ground. A second voltage divider includes a third resistor having the first resistance coupled to the positive voltage potential in series with a fourth resistor having the second resistance, and a fifth resistor having a third resistance and coupled to a negative voltage. A comparator has an inverting input coupled to the junction of the first and second resistors and a non-inverting input coupled to the junction of the third and fourth resistors. The first and third resistors are equal and the second and fourth resistors are equal. The fifth resistor has a value chosen to drop a voltage equal to the target voltage to be regulated when the voltage regulator output is equal to that target voltage.

REFERENCES:
patent: 5686821 (1997-11-01), Brokaw
patent: 6040736 (2000-03-01), Milanesi et al.
patent: 7023262 (2006-04-01), Sim et al.
Giovanni Campardo et al., “40-mm2 3-V-Only 50-MHz 64-Mb 2-b/cell CHE NOR Flash Memory,” IEEE Journal of Solid-State Circuits, vol. 35, No. 11, pp. 1655-1666, Nov. 2000.

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