Low-skew single-ended to differential converter
AssigneeKoninklijke Philips Electronics N.V.
InventorBradley Kendall Davis
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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.
Claims10
A single-ended to differential converter comprising:
- an input stage that provides a first driving signal and a second driving signal from an input signal, the first and second driving signals being out-of-phase with each other, the input stage including:
- a transmission gate, operably coupled to the input signal, that is configured to provide the first driving signal, the transmission gate being configured to be continuously enabled to propagate the input signal to the first driving signal, and
- an input-stage inverter, operably coupled to the input signal, that is configured to provide the second driving signal, and
- a cross-coupled latch, operably coupled to the first and second driving signals, and is configured to provide:
- a first latched signal and
- a second latched signal that is out-of-phase with the first latched signal.
Dependencies are inferred from the claim text.