Circuit for the switching of supply voltages in electrically pro

Details Circuit for the switching of supply voltages in electrically pro Circuit for the switching of supply voltages in electrically pro

1997-04-07

1998-05-19

Nelms, David C.

Static information storage and retrieval

Floating gate

Particular biasing

36518909, G11C 1134

Patent

active

057544735

ABSTRACT:
A circuit for switching of power supply voltages in electrically programmable and erasable non-volatile semiconductor memory devices including a first switch-regulator block connected to a main power supply line with a programming voltage to generate a first programming voltage signal to be supplied to a memory device on a first programming line and a second switch-regulator block powered by the first programming line and designed to generate a second programming voltage to be supplied to the memory device on a second programming line. There is also provided a detector block connected to the first programming line to detect a reaching of a predetermined high level on the rising front of the first programming voltage signal and a reaching of a predetermined low level on the falling front of the first programming voltage signal and to emit at an output a corresponding enablement signal for a third regulator block located downstream.

REFERENCES:
patent: 5109187 (1992-04-01), Guliani
patent: 5214606 (1993-05-01), Hashimoto
patent: 5278785 (1994-01-01), Hazani
patent: 5333122 (1994-07-01), Ninomiya
patent: 5550494 (1996-08-01), Sawada
patent: 5576990 (1996-11-01), Camerlenghi et al.

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