High speed, low noise, low power, electronic memory sensing sche

Details High speed, low noise, low power, electronic memory sensing sche High speed, low noise, low power, electronic memory sensing sche

1996-09-09

1997-10-21

Nelms, David C.

Static information storage and retrieval

Read/write circuit

Differential sensing

36518521, 365205, G11C 700

Patent

active

056803575

ABSTRACT:
An electronic memory. The electronic memory includes memory cells and corresponding reference memory cells. Wordlines are connected to the memory cells and the corresponding reference memory cells. If an accessed memory cell has previously been programmed to a first state, an output from the memory cell is connected to a bitline. An output from a selected reference memory cell is connected to a reference bitline. The bitline and the reference bitline are connected to a differential input sense amplifier. The differential input sense amplifier detects the voltage differential between the bitline and the reference bitline. If the memory cell is accessed and the memory cell is in the first state, the memory cell drives the voltage potential on the bitline from a precharge voltage to a discharge voltage at a first rate. If the memory cell is selected and the memory cell is in a second state, the memory cell does not effect the voltage potential on the bitline and the voltage potential on the bitline remains at the precharge voltage. If the reference memory cell is selected, the reference memory cell drive the voltage potential on the reference bitline from the precharge voltage to the discharge voltage at a second rate. The first rate is faster than the second rate. Therefore, if the selected memory cell is in the first state, the differential sense amplifier will output a first voltage level. If the selected memory cell is in the second state, the differential amplifier will output a second voltage level.

REFERENCES:
patent: 4342102 (1982-07-01), Puar
patent: 4884241 (1989-11-01), Tanaka
patent: 5282169 (1994-01-01), Paseucci
patent: 5327379 (1994-07-01), Paseueci

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