Low-skew single-ended to differential converter
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United States of America Patent
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Oct 10, 2006
Issued Date -
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app pub date -
Sep 30, 2004
filing date -
Sep 30, 2004
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Abstract
A single-ended to differential converter uses a cross-coupled latch that maximizes the output zero-crossing symmetry and is self compensating over PVT variations. An in-phase driving signal is provided by an always-on transmission gate coupled to the input. An out-of-phase driving signal is provided by an inverter coupled to the input. The in-phase and out-of-phase driving signals each drive an input of the cross-coupled latch. The in-phase driving signal from the always-on transmission gate starts to bring the cross-coupled latch into conduction, and when the out-of-phase driving signal arrives, the simultaneous driving of the cross-coupled latch causes a rapid and symmetric transition of both outputs of the cross-coupled latch.
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