On die termination device that can control terminal resistance

Details On die termination device that can control terminal resistance On die termination device that can control terminal resistance

2007-12-26

2009-10-13

Tran, Ahn Q (Department: 2819)

Electronic digital logic circuitry

Signal sensitivity or transmission integrity

Bus or line termination

C326S016000, C326S032000

Reexamination Certificate

active

07602208

ABSTRACT:
An on die termination controls a terminal resistance value in accordance with a test signal. The one die termination device comprises an on die termination control unit and an on die termination resistor unit and can change the terminal resistance value in accordance with the test signal, so that the terminal resistance can be easily analyzed. The one die termination control unit comprises a resistance control enable signal generating unit and a resistance control signal generating unit and generates at least one resistance increment signal and at least one resistance decrement signal. The on die termination resistor unit comprises a resistor and a plurality of switch units that are connected in parallel and is driven by a driving signal and uses the resistance increment signal and resistance decrement signal to control the on die termination resistance value.

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patent: 7372294 (2008-05-01), Kim
patent: 2007/0103189 (2007-05-01), Chang et al.
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patent: 2005-39549 (2005-02-01), None
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patent: 1020050064897 (2005-06-01), None

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