Comparator circuit with wide dynamic range

Details Comparator circuit with wide dynamic range Comparator circuit with wide dynamic range

1996-09-04

1998-06-09

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 52, 327 53, 327 55, 327 66, H03K 526

Patent

active

057640866

ABSTRACT:
The comparator circuit comprises a first comparator circuit having a differential input stage composed of P-channel FETs; a second comparator circuit having a differential input stage composed of N-channel FETs; pull-up and pull-down resistances connected to the output terminals of the two comparator circuits, respectively; at least one skew adjusting circuit having a delay circuit and a selector; and a logical gate for obtaining the two output signals of the two comparator circuits. Since the two differential input signals can be received by the two comparator circuits and according to the potentials of the two differential input signals, even if the supply potential is low, the comparator circuit can compare the two differential input signals in a wide potential range from the ground potential and the supply potential, so that it is possible to provide a high speed interface circuit which can satisfy the LVDS standard at a low supply potential.

REFERENCES:
patent: 3665215 (1972-05-01), Boronkay
patent: 3955102 (1976-05-01), Chi
patent: 4480200 (1984-10-01), Tan et al.
patent: 4626716 (1986-12-01), Miki
patent: 4637018 (1987-01-01), Flora et al.
patent: 4679209 (1987-07-01), Hogeboom et al.
patent: 5245223 (1993-09-01), Lim et al.
patent: 5546025 (1996-08-01), Casselman

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