Input buffer circuit capable of adjusting variation in skew
AssigneeHynix Semiconductor Inc.
InventorHo Seok Em
Life of this patent
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Abstract
An input buffer circuit for use in a semiconductor device includes a comparator configured to compare a reference voltage with a voltage of an input signal, and output the result of comparison, an activation unit configured to control an activation state of an input buffer in response to an enable signal, a skew adjusting unit configured to change an amount of a current flowing in the comparator in response to one or more skew adjusting signals, and a control signal generator configured to control the enable signal and the skew adjusting signal in response to one or more calibration codes and an input control signal.
Claims14
An input buffer circuit comprising:
- a comparator configured to compare a reference voltage with a voltage of an input signal, and output an output signal;
- an activation unit configured to activate or deactivate the input buffer circuit in response to an enable signal;
- a skew adjusting unit configured to change an amount of a current flowing in the comparator in response to one or more skew adjusting signals;
- and
- a control signal generator configured to generate the enable signal and the one or more skew adjusting signals in response to one or more calibration codes and an input control signal,
- wherein, if the calibration codes are in a slow (SS) state, both the activation unit and the skew adjusting unit are operated so that the amount of the current flowing in the comparator is increased.
Dependencies are inferred from the claim text.