Differential input receiver and method for reducing noise

Details Differential input receiver and method for reducing noise Differential input receiver and method for reducing noise

1998-12-14

2000-10-17

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Particular stable state circuit

327205, 327 68, 327 80, H03K 3286

Patent

active

061337722

ABSTRACT:
An integrated circuit and method utilizes a differential input receiver having a first input that receives an input signal. A reference voltage adjustment circuit produces a variable reference signal for the second input of a differential input receiver. A feedback path is provided from the output of the differential input receiver to an input of the reference voltage adjustment circuit. The reference voltage adjustment circuit dynamically varies the variable reference voltage signal to facilitate hysteresis. The variable reference voltage signal is lowered in the case of a high input signal, and raised in the case of a low input signal.

REFERENCES:
patent: 4783607 (1988-11-01), Hsieh
patent: 5229720 (1993-07-01), Nishimura
patent: 5266884 (1993-11-01), Agiman
patent: 5675269 (1997-10-01), Nakauchi
patent: 5748534 (1998-05-01), Dunlap et al.
patent: 5798663 (1998-08-01), Fugere et al.
A.G.P. Design Guide: Covering 1X, 2X, and 4X Modes and 1.5 Volt and 3.3 Volt Signaling (Revision 1.0, Intel Corporation, Aug. 1998); and.
Accelerated Graphics Port Interface Specification (Revision 2.0, Intel Corporation, May 4, 1998).

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