Sense amplifier circuit

Details Sense amplifier circuit Sense amplifier circuit

1995-08-14

1997-02-18

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 63, 327437, 36518909, H03F 345, G11C 700

Patent

active

056044518

ABSTRACT:
A highly stable sense amplifier circuit for a RAM and ROM includes a bias generating circuit capable of changing a bias voltage corresponding to voltage shifts of data lines, and an amplifying circuit having a transistor, the conducting state of which is controlled by the bias voltage for amplifying the voltage differences of the data lines. When the voltage of the data lines shifts due to manufacturing deviations, the bias voltage also shifts but operates so as to compensate shifts of the transistor in the amplifying circuit, so that the sense amplifier circuit can amplify the voltage differences of the data lines in a stable manner. The sense amplifier circuit can be formed with switches for cutting off through-currents, so that the sense amplifier circuit or even the memory on which the sense amplifier circuit is formed can operate with low power consumption.

REFERENCES:
patent: 3502905 (1970-03-01), Bicking
patent: 5280198 (1994-01-01), Almulla
patent: 5280199 (1994-01-01), Itakura
patent: 5391938 (1995-02-01), Hatsuda
patent: 5402375 (1995-03-01), Horiguchi et al.
Katsuro Sasaki et al, "A 7ns 140mW 1Mb CMOS SRAM with Current Sense Amplifier," 1992 IEEE International Solid-State Circuits Conference, pp. 208-209.

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