Circuit for generating a tracking reference voltage

Details Circuit for generating a tracking reference voltage Circuit for generating a tracking reference voltage

2007-04-24

2007-04-24

Le, Don (Department: 2819)

Electronic digital logic circuitry

Signal sensitivity or transmission integrity

Output switching noise reduction

C326S030000, C326S082000

Reexamination Certificate

active

10845568

ABSTRACT:
Two or more integrated circuit (IC) chips are separated by a significant distance relative to their communication frequency such that pseudo-differential signaling is used to improve signal detection. A derived reference voltage is generated that tracks the variations of the driver and receiver side power supply variations that normally reduce noise margins. The derived reference voltage is filtered to reduce high frequency response and coupled as the reference to differential receivers used to detect the logic levels of the communication signals.

REFERENCES:
patent: 6492846 (2002-12-01), Taguchi et al.
patent: 6985009 (2006-01-01), Nishio et al.
patent: 2004/0264267 (2004-12-01), Nishio et al.
patent: 2006/0082383 (2006-04-01), Choi

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