Variable potential generating circuit using current-scaling addi

Details Variable potential generating circuit using current-scaling addi Variable potential generating circuit using current-scaling addi

1999-09-28

2000-05-09

Phan, Trong

Static information storage and retrieval

Powering

36518909, G11C 700, G11C 1604

Patent

active

060612894

ABSTRACT:
A variable potential generating circuit includes a resistive potential divider circuit and first and second operational amplifiers. The resistive potential divider circuit includes a switching element and a current-scaling type digital/analog converter circuit connected in series between a power supply node and a ground node. The resistive potential divider circuit has a first node at which a divided potential obtained by resistive division of a variable potential to be output from a variable potential output node appears and a second node to which a virtual potential is applied. The first operational amplifier compares the divided potential of the first node with a reference potential to effect the feedback control for setting the variable output potential equal to the reference potential. The second operational amplifier compares the virtual potential of the second node with the reference potential to effect the feedback control for setting the virtual potential equal to the reference potential.

REFERENCES:
patent: 5119095 (1992-06-01), Asazawa
patent: 5302951 (1994-04-01), Yamashita
patent: 5436586 (1995-07-01), Miyamoto
patent: 5668550 (1997-09-01), Coleman, Jr.
patent: 5870049 (1999-02-01), Huang et al.
patent: 5943282 (1999-08-01), Iwata et al.
patent: 5991221 (1999-11-01), Ishikawa et al.
"VLSI Design Techniques for Analog and Digital Circuits"; R.L. Geiger et al.; McGraw-Hill Pub. Company; p. 623-625.

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