Rabin & Berdo, P.C.
Method and apparatus for multi-level signaling adaptation with fixed reference levels
The present disclosure relates to an adaptation method for data level (dLev) or data swing detection in a high-speed link system for multi-level (e.g. PAM-4) signaling. Provided are a receiver and a receiving method in which when a swing range of data received as an input is changed according to a channel condition, reference levels of data/swing detection samplers are not adaptively controlled, but the reference levels are fixed and a variable gain amplifier (VGA) is adaptively controlled for response to the change. Through the present disclosure, offset calibration of the data/swing detection samplers is more accurately performed and lower bit error rate (BER) is thus achieved.
Seoul National University R&DB Foundation
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Deog-Kyoon Woonghee Minkyo Yunhee
Jeong Lee Shim Lee