Industry-university Cooperation Foundation Hanyang University

Eunji Song

Jaeduk Han

Sanghun Lee

Hyuntae Kim

Hyeongmin Seo

YunSeong Jo

Seonghyun Park

A pulse-amplitude modulation (PAM) transmitter includes a transceiver, and at least one processor connected to the transceiver and configured to identify, from among symbols included in an input signal, a symbol that exceeds a specified transition level, when the symbol exceeding the transition level is identified, obtain a frame buffer including at least one bit among bits constituting the identified symbol, encode input data by inverting at least one bit among the bits constituting the identified symbol, and transmit the frame buffer and the encoded input data.

Pulse-amplitude modulation transmitter and receiver and method of limiting transition level thereof

According to an aspect, a data inversion circuit configured to perform DBI-DC encoding using a PAM 4 signal may comprise a data generation unit configured to generate input data based on the PAM 4 signal and a data transmission unit comprising, an auxiliary signal generation unit configured to generate an auxiliary signal that determines whether to perform encoding on the input data by analyzing a plurality of data symbols included in the input data, a channel comprising a plurality of data lines and a data encoding unit configured to generate encoded data by performing DBI (data bus inversion) encoding on the data based on the auxiliary signal and to transmit the generated encoded data to a data reception unit via the channel.

Data inversion circuit to perform DBI-DC encoding using PAM 4 signal

According to an aspect, a data inversion circuit configured to perform DBI-AC encoding using a PAM 4 signal may comprise a data generation unit configured to generate input data based on the PAM 4 signal, a channel comprising N data lines, a first auxiliary signal generation unit configured to generate a first auxiliary signal that determines whether to perform a first encoding on the input data based on the number of each of a plurality of data symbols included in the input data, a first data encoding unit configured to generate intermediate data by performing the first encoding on the input data based on the first auxiliary signal, a second auxiliary signal generation unit configured to generate a second auxiliary signal that determines whether to perform a third encoding on the intermediate data by analyzing the relationship between a plurality of data symbols at a current time point and a plurality of data symbols at a previous time point included in the intermediate data and a second data encoding unit configured to generate encoded data by performing the third encoding on the intermediate data based on the second auxiliary signal, and to transmit the generated encoded data to a data reception unit via the channel and the first auxiliary signal and the second auxiliary signal may be combined into one signal and implemented as a PAM 4 signal.

Growing community of inventors

Seoul, South Korea

Eunji Song