Sense amplifier circuitry

Details Sense amplifier circuitry Sense amplifier circuitry

1996-11-19

1998-06-23

Nguyen, Tan T.

Static information storage and retrieval

Read/write circuit

Differential sensing

36518906, 36518911, G11G 702

Patent

active

057711968

ABSTRACT:
The sense amplifier of the present invention contains a circuit that can pre-charge its output to a default state (e.g., the "0" state) during one time period and sets the output to a second state in another time period only if there is a need to do so. In this sense amplifier, cell leakage (and not cell current) is used as reference. Further, only the second state needs to be developed. As a result, the sensing margin increases. One characteristics of the present sense amplifier is that different parts of the circuit is active during different time period. As a result, both noise and power consumption is reduced. The sense amplifier is coupled to a timing circuit that can provide appropriate timing signals to operate the sense amplifier. In addition, a power-on reset circuit is disclosed. This reset circuit is operative when power is first applied to the system. It causes the timing circuit to generates a timing signal so that valid data can be detected by the sense amplifier when power is turned on.

REFERENCES:
patent: 4932002 (1990-06-01), Houston
patent: 5526314 (1996-06-01), Kumar
patent: 5646887 (1997-07-01), Truong et al.

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