Semiconductor devices for receiving a current mode signal and methods of operating the same
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United States of America Patent
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Apr 6, 2010
Grant Date -
May 29, 2008
app pub date -
Nov 9, 2007
filing date -
Nov 9, 2006
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Embodiments of methods and apparatus for receiving data are disclosed. More particularly, methods of receiving a current mode signal, which can improve a signal to noise ratio (SNR) according to a change in a power supply voltage, and current mode comparators and semiconductor devices that use the methods are provided. A method of receiving a current mode signal includes receiving a reference current signal and a data current signal through a channel and generating a sensing voltage based on a difference between the reference current signal and the data current signal, varying a transconductance to reduce an input resistance of the current mode comparator in inverse proportion to an increase in a power supply voltage supplied to the current mode comparator, and converting the sensing voltage into a CMOS level output signal using the current mode comparator.
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