Electronic digital logic circuitry – Signal sensitivity or transmission integrity – Bus or line termination
Reexamination Certificate
2006-01-10
2006-01-10
Chang, Daniel (Department: 2819)
Electronic digital logic circuitry
Signal sensitivity or transmission integrity
Bus or line termination
C326S087000, C327S112000, C327S316000
Reexamination Certificate
active
06985008
ABSTRACT:
An impedance controller that controls termination impedance of at least one output based on a reference value including a programmable reference impedance generator, at least one termination logic element, and an impedance matching controller. The programmable reference impedance generator develops a reference impedance controlled by a reference impedance control input. Each termination logic element includes a programmable termination impedance generator coupled to a corresponding output and controlled by termination impedance control input. The impedance matching controller continually adjusts the reference impedance control input to match the reference impedance with the reference value within a predetermined tolerance and generates the termination impedance control input based on the reference impedance control input.
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Chang Daniel
Huffman James W.
Huffman Richard K.
IP-First LLC
Stanford Gary R.
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