Apparatus and method of tuning a digitally controlled...

Details Apparatus and method of tuning a digitally controlled... Apparatus and method of tuning a digitally controlled...

2007-01-23

2007-01-23

Tran, Anh Q. (Department: 2819)

Electronic digital logic circuitry

Signal sensitivity or transmission integrity

Bus or line termination

C326S033000, C326S034000, C326S087000

Reexamination Certificate

active

11038732

ABSTRACT:
Apparatus and method of tuning a digitally controlled input/output (I/O) driver of an integrated circuit for parameter variation compensation, a bus impedance of the I/O driver being controlled by a first digital code comprises in one embodiment: controlling a bus impedance of a reference I/O driver network by a second digital code; monitoring a voltage potential of the bus and generating the second digital code based on the monitored bus voltage potential; and tuning the second digital code to generate the first digital code.

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patent: 2002/0091948 (2002-07-01), Werner et al.
patent: 2004/0113654 (2004-06-01), Lundberg

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