Robust method and apparatus for providing a digital single-ended output from a differential input
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United States of America Patent
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Jun 27, 2000
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app pub date -
Jun 17, 1999
filing date -
Jun 17, 1999
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Abstract
An embodiment of the invention is directed to a method of automatically adjusting a common mode output level of a first differential amplifier that is connected to a first digital circuit, in response to variation in a trip point level of a second digital circuit. The second digital circuit includes a replicate of the first digital circuit to generate a trip point level that is equivalent to a trip point level of the first digital circuit. The invention may yield a single-ended digital signal whose duty cycle accurately tracks that of an input differential signal pair in a manner that is substantially independent of fabrication process skew.
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