On-die termination circuit
AssigneeHynix Semiconductor Inc.
InventorGeun-Il Lee
Life of this patent
Estimating the term…
Abstract
An on-die termination circuit includes: a feedback unit for outputting a feedback signal in response to a plurality of code signals corresponding to an input-resistor; a code signal generation unit for generating the plurality of code signals in order for the feedback signal to have a level corresponding to a reference voltage; and a control unit for continuously enabling the feedback unit in response to an initialization signal in order to repeatedly operate the code signal generation unit while the feedback unit is continuously enabled.
Claims15
An on-die termination circuit, comprising:
- a feedback unit for outputting a feedback signal in response to a plurality of code signals corresponding to an input-resistor;
- a code signal generation unit for generating the plurality of code signals in order for the feedback signal to have a level corresponding to a reference voltage;
- and
- a control unit for continuously enabling the feedback unit in response to an initialization signal in order to repeatedly operate the code signal generation unit while the feedback unit is continuously enabled.
An on-die termination circuit, comprising:
- a feedback unit for outputting a feedback signal in response to a plurality of code signals corresponding to an input-resistor and first and second enable signals;
- a code signal generation unit for generating the plurality of code signals in order for the feedback signal to have a level corresponding to a reference voltage in response to the first enable signal and a comparison enable signal;
- and
- a control unit for keeping an activation state of the second enable signal during a first period, repeatedly activating the second enable signal during a second period, and repeatedly activating the first enable signal and the comparison enable signal during the first and second periods.
A method for operating an on-die termination circuit, comprising:
- outputting a feedback signal continuously in response to a plurality of code signals corresponding to an input-resistor;
- and
- adjusting the plurality of code signals repeatedly for the feedback signal to have a target level corresponding to a reference voltage during the outputting the feedback signal.
A method for operating an on-die termination circuit, comprising:
- outputting a feedback signal in response to a plurality of code signals corresponding to an input-resistor;
- and
- adjusting the plurality of code signals for the feedback signal to have a target level corresponding to a reference voltage,
- wherein the adjusting the plurality of code signals is repeatedly performed while the outputting the feedback signal is continuously performed during a first period, and an operation of performing the adjusting the plurality of code signals twice, after performing the outputting the feedback signal once, is repeatedly performed during a second period after the first period.
A method for calibrating an on-die termination circuit, comprising:
- performing an on-die termination (ODT) calibration operation continuously for a predetermined time in response to a plurality of code signals during an initial period;
- and
- performing the ODT calibration operation in response to the plurality of code signals only when an enable signal is activated after the predetermined time.
Dependencies are inferred from the claim text.