Multi-function equalizer arrangement
AssigneeAgere Systems Inc.
InventorsGang Huang, Zhenyu Wang
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Abstract
A data communication transceiver comprises an equalizer that is operable to selectively participate in one of several different signal processing functions in the transceiver. In a disclosed embodiment the equalizer operates in an echo canceller when the transceiver is transmitting signals, and operates in a feedback equalizer when the transceiver is not transmitting signals.
Claims22
A data communication transceiver comprising:
- transmitter circuitry that processes transmitter signals,
- receiver circuitry that processes receiver signals, and
- an equalizer that is selectively operable:
- (a) in an echo canceller cancelling transmitter signals during intervals when the transceiver transmits signals, and
- (b) in a feedback equalizer equalizing receiver signals during intervals when the transceiver does not transmit signals.
An arrangement for use in a data communication transceiver, the arrangement comprising an equalizer that is operable to selectively participate in one of several different signal processing functions in the transceiver, wherein:
- the arrangement further comprises:
- transmitter circuitry that processes transmitter signals;
- and
- receiver circuitry that processes receiver signals, and
- the several different signal processing functions include an echo canceller function and a feedback equalizer function;
- when the transceiver transmits signals, the equalizer is configured to receive an input signal from the transmitter circuitry to support the echo canceller function;
- and
- when the transceiver does not transmit signals, the equalizer is configured to receive an input signal from the receiver circuitry to support the feedback equalizer function.
A method of operating a data communication transceiver, the transceiver comprising transmitter circuitry that processes transmitter signals and receiver circuitry that processes received signals, the transceiver comprising an equalizer, comprising the steps of selectively:
- (a) operating the equalizer in an echo canceller when the transceiver is transmitting signals;
- and
- (b) operating the equalizer in a feedback equalizer when the transceiver is not transmitting signals.
Dependencies are inferred from the claim text.