Static information storage and retrieval – Read/write circuit – Including level shift or pull-up circuit
Patent
1998-02-25
1999-09-28
Nelms, David
Static information storage and retrieval
Read/write circuit
Including level shift or pull-up circuit
G11C 700
Patent
active
059599022
ABSTRACT:
In a first operation mode the level shifter transmits as output a logic input signal and in a second operation mode it shifts the high logic level of the input signal from a low to a high voltage. The level shifter comprises a CMOS switch and a pull-up transistor; the CMOS switch comprises an NMOS transistor and a PMOS transistor which are connected in parallel between the input and the output of the shifter and have respective control terminals connected to a first supply line at low voltage and, respectively, to a control line connected to ground in the first operation mode and to the high voltage in the second operation mode; the pull-up transistor is connected between the output of the shifter and a second supply line switchable between the low voltage and the high voltage and has a control terminal connected to the first supply line.
REFERENCES:
patent: 5365479 (1994-11-01), Hoang et al.
patent: 5708604 (1998-01-01), Fontana et al.
patent: 5787037 (1998-07-01), Amanai
Barcella Antonio
Fontana Marco
Carlson David V.
Nelms David
Phung Anh
STMicroelectronics S.r.l.
Tarleton E. Russell
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