Patent ID: 11902059
Assignee: APPLE INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An apparatus comprising:
a front-end circuit coupled to a communications link, wherein the front-end circuit is configured to:
receive a signal that encodes a plurality of data symbols; and
modify, using one or more control signals, one or more frequency components of the signal to generate an equalized signal;
wherein the front-end circuit includes a summing circuit configured to generate the equalized signal based on a feedback signal and a filtered signal generated in the front-end circuit;

a sample recovery circuit configured to sample the equalized signal to generate a plurality of recovered data symbols;
a decision feedback equalization (DFE) circuit configured to generate the feedback signal based on the plurality of recovered data symbols; and
a logic circuit configured to cause adjustment to one or more filters in the front-end circuit based on the plurality of recovered data symbols, wherein the one or more filters include one or more resistors and one or more capacitors, and wherein the logic circuit comprises a finite state machine configured to generate control signals to cause adjustment of respective resistances provided by the one or more resistors and capacitances provided by the one or more capacitors.