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US 8,300,683 B1Granted
Differential energy difference integrator
AssigneeCypress Semiconductor Corporation
InventorDusan Vecera
Life of this patent
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Abstract
Embodiments of the invention are generally directed to a high-speed differential energy difference integrator (EDI) for adaptive equalizers. In an embodiment, the EDI includes two differential full-wave rectifiers providing differential outputs that are cross-coupled to the inputs of an integration capacitor. In one embodiment, the active areas of the transistors of the differential full-wave rectifiers are substantially the same.
Claims7
An equalizer circuit comprising:
- an inverse cable filter to receive a signal from a transmission line;
- a slicer coupled with the inverse cable filter to receive an output from the inverse cable filter;
- and
- an energy difference integrator coupled to receive as a first input the output from the inverse cable filter and coupled to receive as a second input an output from the slicer, wherein the energy difference integrator provides a fully differential feedback control signal to the inverse cable filter, the energy difference integrator comprising a full-wave rectifier, wherein the full-wave rectifier comprises a plurality of transistors each having an active area that is substantially the same.
1 more element
Dependencies are inferred from the claim text.