Substrate voltage generation circuit

Details Substrate voltage generation circuit Substrate voltage generation circuit

1997-12-23

2000-08-15

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327541, 327534, G05F 110

Patent

active

06104234&

ABSTRACT:
An improved substrate voltage (VBB) generation circuit is disclosed. The circuit reduces variations in VBB (.DELTA.VBB) caused by variations (.DELTA.VCC) in a system voltage (VCC) by making a threshold voltage (Vt) of a logic element, e.g., an inverter of in a buffer, more sensitive to .DELTA.VCC. In contrast, the conventional art had attempted to reduce .DELTA.VBB by making the Vt of the logic element less sensitive to .DELTA.VCC. Two features of the improved logic element of the circuit contribute to the reduction of .DELTA.VBB. These features are: adopting an opposite channel ratio arrangement versus the conventional art; and incorporating additional active resistors.

REFERENCES:
patent: 5012141 (1991-04-01), Tomisawa
patent: 5327072 (1994-07-01), Savignac
patent: 5378936 (1995-01-01), Kokubo et al.
patent: 5467039 (1995-11-01), Bae
patent: 5506540 (1996-04-01), Sakurai
patent: 5672996 (1997-09-01), Pyeon

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