US 12,339,298 B2 · Method of CTLE estimation using channel step-response for transmitter link equalization test

Abstract

A method of automatically selecting a continuous time linear equalization (CTLE) filter includes capturing a response waveform for a channel of a communication link of a device under test (DUT), generating a set of candidate CTLEs, and automatically selecting the CTLE from the set of candidate CTLEs using the response waveform. A test and measurement instrument has a user interface, a port to allow the instrument to connect to a device under test (DUT), and one or more processors configured to execute code to cause the one or more processors to: generate a set of CTLE candidates; capture a response waveform for the channel; and automatically select the CTLE from the set of candidate CTLEs using the response waveform.

Claims18

Dependent claims

A method of automatically selecting a continuous time linear equalization (CTLE) filter for a communication link equalization, comprising:

capturing a signal transmitted over the communication link;
receiving, through a user interface, a user-defined granularity for direct current (DC) gain steps for one or more analog-to-digital converters (ADC);
generating a set of candidate CTLEs by varying the direct current gain across a range of DC values as the user-defined granularity for the one or more ADCs;
using the one or more ADCs to generate a response waveform for a channel in a communications link for each of the candidate CTLEs;
automatically selecting the CTLE from the set of candidate CTLEs using the response waveform;
and
applying the CTLE to protocol traffic to equalize the channel on the communication link to improve traffic on the channel.

4 more elements

A test and measurement instrument, comprising:

a user interface;
a port to allow the instrument to connect to a device generating a signal on a communication link;
one or more analog-to-digital converters (ADC) to receive the signal and convert the signal to a digitized waveform;
and
one or more processors configured to execute code to cause the one or more processors to:
receive, through the user interface, a user-defined granularity for a direct current (DC) gain;
generate a set of continuous time linear equalization filter (CTLE) candidates by varying the DC gain across a range of DC values at the user-defined granularity for the one or more ADCs;
capture a response waveform for the channel;
automatically select the CTLE from the set of candidate CTLEs using the response waveform for the channel;
apply the CTLE to protocol traffic on the communication link to equalize the channel and improve the protocol traffic.

7 more elements

Dependencies are inferred from the claim text.

Method of CTLE estimation using channel step-response for transmitter link equalization test

Life of this patent

Method of CTLE estimation using channel step-response for transmitter link equalization test

Life of this patent

Abstract

Claims18