Open collector bit driver/sense amplifier

Details Open collector bit driver/sense amplifier Open collector bit driver/sense amplifier

G - Physics

11

C

352/82.1

G11C 11/40 (2006.01) G11C 11/416 (2006.01) G11C 17/06 (2006.01) G11C 17/08 (2006.01)

Patent

CA 1128207

AN OPEN COLLECTOR BIT DRIVER/SENSE AMPLIFIER Abstract Disclosed is an improved sense amplifier/bit driver circuit including first and second transistors con- nected in a current mirror configuration. A bit line connected to a plurality of memory cells is connected to the collector of the first of the two transistors while the second of the transistors provides an output at its collector. A current source is con- nected to the base regions of both the first and second transistors for supplying current when a bit line is to be selected. Current flow through the second transistor is supplied to additional circuitry including a driver circuit, a clamping circuit and a zero filter circuit. Also disclosed is a reference voltage generator which accurately tracks the sense amplifier circuit and provides a reference voltage at or near the midpoint between a binary 1 and binay 0 level. The sense amplifier sustantially senses current rather than voltage and also acts as a high power over driven bit driver. FI9-78-051

331674

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