Calibration circuit of on-die termination device

Details Calibration circuit of on-die termination device Calibration circuit of on-die termination device

2011-03-22

2011-03-22

Cho, James H. (Department: 2819)

Electronic digital logic circuitry

Signal sensitivity or transmission integrity

Bus or line termination

C326S083000, C326S086000, C326S026000

Reexamination Certificate

active

07911223

ABSTRACT:
A calibration circuit of an on-die termination device includes a code generating unit configured to receive a voltage of a calibration node connected to an external resistor and a reference voltage to generate pull-up calibration codes. The calibration circuit also includes a pull-up calibration resistor unit configured to pull up the calibration node in response to the pull-up calibration codes. The pull-up calibration resistor unit is calibrated such that its resistance becomes higher as a power supply voltage increases.

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Notice of Allowance issued from Korean Intellectual Property Office on Sep. 29, 2009.
Notice of Preliminary Rejection issued from Korean Intellectual Property Office on Dec. 16, 2008.

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