Bandgap voltage reference generator

Details Bandgap voltage reference generator Bandgap voltage reference generator

1994-07-27

1995-09-26

Nelms, David C.

Static information storage and retrieval

Read/write circuit

Including reference or bias voltage generator

365226, 327535, 327539, G05F 324

Patent

active

054539536

ABSTRACT:
A voltage regulator is provided for controlling an on-chip voltage generator which produces a boost voltage across a charge reservoir for supply to one input of a plurality of word line drivers in a memory array. The regulator is configured such that the charge reservoir voltage will track the power supply voltage and the difference between the power supply voltage and the charge reservoir voltage will be maintained substantially constant over a predefined power supply range. The voltage regulator includes a bandgap reference generator, a first differential circuit for producing a transition voltage from the reference voltage and the power supply voltage, a first transistor for comparing the power supply voltage with the boost voltage, a second transistor for comparing the transition voltage with the reference voltage and a latching comparator for equating the signal outputs from the first and second transistors so as to define a control signal for the on-chip voltage generator. Along with further specific details of the voltage regulator, a preferred bandgap reference generator is described.

REFERENCES:
patent: 4875018 (1989-10-01), Draxelmayr
patent: 4994730 (1991-02-01), Rossi et al.
patent: 5109187 (1992-04-01), Guliani
patent: 5180966 (1993-01-01), Sugawara et al.

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