Impedance adjustment circuit, impedance adjustment method,...

Details Impedance adjustment circuit, impedance adjustment method,... Impedance adjustment circuit, impedance adjustment method,...

2006-08-01

2006-08-01

Chang, Daniel (Department: 2819)

Electronic digital logic circuitry

Signal sensitivity or transmission integrity

Bus or line termination

C327S334000

Reexamination Certificate

active

07084663

ABSTRACT:
An impedance adjustment circuit has an external resistor, a comparator which compares the potential of one terminal of the external resistor with a predetermined voltage, a counter whose counted value changes in accordance with an output from the comparator and which outputs a control signal corresponding to the counted value, an NMOS array whose value of resistance changes in accordance with the control signal and which is connected to one terminal of the external resistor and an NMOS arbitration circuit which detects an output from the NMOS comparator a plurality of times and outputs a signal determined by a majority decision logic taken on the detected signals to the counter.

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