US 2020/0052933 A1 · SIGNAL RECEIVING DEVICE AND EQUALIZER TUNING METHOD THEREOF

Abstract

A signal receiving device and an equalizer tuning method thereof are provided. A first equalizer receives an input signal and generates a first equalized signal by compensating the input signal according to a first equalization parameter. A second equalizer generates a second equalized signal by compensating the first equalized signal according to a second equalization parameter. A clock and data recovery circuit recovers the second equalized signal to generate an output signal. An equalizing controller receives the input signal and outputs a first control signal and a second control signal, to adjust the first equalization parameter according to the first control signal and adjust the second equalization parameter according to the second control signal. The equalizing controller detects a first pattern symbol and a second pattern symbol from the output signal and tunes the second equalization parameter according to the number of the first pattern symbol and the second pattern symbol.

Claims20

Dependent claims

A signal receiving device, comprising:

a first equalizer, receiving an input signal, and generating a first equalized signal by compensating the input signal according to a first equalization parameter;
a second equalizer, coupled to the first equalizer, and generating a second equalized signal by compensating the first equalized signal according to a second equalization parameter;
a clock and data recovery circuit, coupled to the second equalizer, recovering the second equalized signal to generate an output signal;
and
an equalization controller, receiving the output signal, and outputting a first control signal and a second control signal to adjust the first equalization parameter according to the first control signal and adjust the second equalization parameter according to the second control signal,
wherein the equalization controller detects a first pattern symbol and a second pattern symbol from the output signal and adjusts the second equalization parameter according to the number of the first pattern symbol and the number of the second pattern symbol in a counting period.

3 more elements

An equalizer tuning method, comprising:

receiving an input signal and generating a first equalized signal by compensating the input signal according to a first equalization parameter by a first equalizer;
generating a second equalized signal by compensating the first equalized signal according to a second equalization parameter by a second equalizer;
recovering the second equalized signal to generate an output signal by a clock and data recovery circuit;
detecting a first pattern symbol and a second pattern symbol from the output signal and adjusting the second equalization parameter according to the number of the first pattern symbol and the number of the second pattern symbol in a counting period by an equalization controller;
and
outputting a first control signal and a second control signal by the equalization controller, to adjust the first equalization parameter according to the first control signal and adjust the second equalization parameter according to the second control signal.

3 more elements

Dependencies are inferred from the claim text.

Signal receiving device and equalizer tuning method thereof

Life of this patent

Signal receiving device and equalizer tuning method thereof

Life of this patent

Abstract

Claims20