Adaptive reference voltage method and system

Details Adaptive reference voltage method and system Adaptive reference voltage method and system

2005-06-14

2005-06-14

Deb, Anjan (Department: 2858)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

C324S613000

Reexamination Certificate

active

06906531

ABSTRACT:
An adaptive reference voltage method and system analyzes a received bus signal to evaluate voltage swing characteristics and adjusts the reference voltage for reading the signal to a level that compensates for variations in margins between high and low signal switching values such as are introduced by noise. A bus input signal analyzer circuit incorporated in an integrated circuit analyzes the bus signal received at the integrated circuit to adjust the reference voltage used by the integrated circuit. In one embodiment, the bus input signal analyzer circuit applies a feedback loop to adapt the reference voltage by setting high and low input values to a reference voltage generation circuit with the reference voltage centered between the high and low values, such as results from a resistor divider network.

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