Decision-feedback equalizer using feedback filter with controllable delay circuit and associated method
AssigneeMediatek Inc.
InventorsChih-Lun Chuang, Wen-Hsuan Hsieh
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Abstract
A decision-feedback equalizer (DFE) includes a combining circuit and a feedback filter. The combining circuit combines an input signal and at least one feedback signal to generate an equalized signal. The feedback filter generates the at least one feedback signal according to the equalized signal, and includes a controllable delay circuit. The controllable delay circuit receives an output signal that is derived from the equalized signal, and applies at least one delay amount to generate at least one delay signal, wherein the at least one feedback signal is derived from the at least one delay signal.
Claims20
A decision-feedback equalizer (DFE) comprising:
- a combining circuit, arranged to combine an input signal and at least one feedback signal to generate an equalized signal;
- and
- a feedback filter, arranged to generate the at least one feedback signal according to the equalized signal, wherein the feedback filter comprises:
- a controllable delay circuit, arranged to receive an output signal that is derived from the equalized signal, and apply at least one delay amount to generate at least one delay signal, wherein the at least one feedback signal is derived from the at least one delay signal.
A decision-feedback equalization method comprising:
- combining an input signal and at least one feedback signal to generate an equalized signal;
- and
- generating the at least one feedback signal according to the equalized signal, comprising:
- in response to receiving an output signal that is derived from the equalized signal, applying, by a controllable delay circuit, at least one delay amount to generate at least one delay signal, wherein the at least one feedback signal is derived from the at least one delay signal.
Dependencies are inferred from the claim text.