Apparatus for controlling on-die termination

Details Apparatus for controlling on-die termination Apparatus for controlling on-die termination

2011-02-15

2011-02-15

Pert, Evan (Department: 2826)

Electronic digital logic circuitry

Signal sensitivity or transmission integrity

Bus or line termination

C327S108000

Reexamination Certificate

active

07888963

ABSTRACT:
An on-die termination control unit turns on/off a corresponding transistor according to a code signal and adjusts an on-die termination resistance so it is equal to an external resistance. An offset compensating unit detects an offset voltage from an output voltage of the on-die termination control unit, stores the detected offset voltage in a capacitor, compares the capacitor voltage canceled the offset voltage with a preset reference voltage, and outputs the comparison result. A latch stores the output of the offset compensating unit for a predetermined time. A counter counts the output of the latch and increases or decreases the code signal.

REFERENCES:
patent: 7288959 (2007-10-01), Lee
patent: 2003/0164730 (2003-09-01), Milanesi
patent: 1519853 (2004-08-01), None
patent: 1655279 (2005-08-01), None
patent: 544995 (2003-08-01), None

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