High speed current sense amplifier

Details High speed current sense amplifier High speed current sense amplifier

1996-11-25

1998-11-10

Tran, Toan

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 55, G11C 706, G01R 1900

Patent

active

058349537

ABSTRACT:
A high speed current sense amplifier useful in memory devices, which includes a current-to-voltage amplifier that is coupled to a voltage amplifier. The current-to-voltage amplifier has an input impedance that is lower than its output impedance. The voltage amplifier has an input impedance that is larger than the input impedance of the current-to-voltage amplifier. The current sense amplifier can sense the current relationship between two current inputs in about 200 pico-seconds. Embodiments of the current sense amplifier enable current sensing either near the power supply voltage or near ground, thus eliminating the need for intermediate voltages. Embodiments of the current sense amplifier draw current from the current inputs only during the 200 pico-second sensing time and does not require external latching circuitry.

REFERENCES:
patent: 4247791 (1981-01-01), Rovell
patent: 4253163 (1981-02-01), Komoriya et al.
patent: 4255679 (1981-03-01), White Jr. et al.
patent: 5274275 (1993-12-01), Colles
patent: 5534800 (1996-07-01), Hiraki et al.
patent: 5552728 (1996-09-01), Lin

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