Back to results
US 8,526,487 B1Granted
Differential energy difference integrator
AssigneeCypress Semiconductor Corporation
InventorDusan Vecera
Life of this patent
Estimating the term…
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.
Claims18
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 is configured to perform an integration of differential signals and to provide a fully differential feedback control signal to the inverse cable filter, and wherein the energy difference integrator comprises a first full-wave rectifier, wherein the first full-wave rectifier comprises a plurality of transistors each having an active area that is substantially the same.
1 more element
A method comprising:
- receiving an output of inverse cable filter;
- receiving an output of a slicer;
- integrating, by an energy difference integrator, the output of the inverse cable filter and the output of the slice as differential signals;
- wherein the energy difference integrator comprises a first full-wave rectifier, wherein the first full-wave rectifier comprises a plurality of transistors each having an active area that is substantially the same;
- and
- generating, by the energy difference integrator, a fully differential feedback control signal, based on the integrated outputs of the inverse cable filter and the slicer.
3 more elements
An apparatus comprising:
- an inverse cable filter;
- a slicer coupled to the inverse cable filter;
- an output driver coupled to the slicer;
- and
- an energy difference integrator coupled to the cable filter and the slicer, the energy difference integrator comprising a first full-wave rectifier, a second full-wave rectifier, and an integration capacitor, the first and second full-wave rectifiers having current outputs that are cross-coupled to perform an integration of differential signals and to provide a differential current to drive the integration capacitor, wherein at least one of the first and second full-wave rectifier comprises a plurality of transistors each having an active area that is substantially the same.
2 more elements
Dependencies are inferred from the claim text.