University of Seoul Industry Cooperation Foundation

Samsung Electronics Co., Ltd.

Yongsam Moon

Yo-Han Kim

Jae-Geol Lee

Hyeon-Woo Ahn

Soo-Hwan Yoo

Junghwan Choi

Kyung-Hyun Kim

Yohan Kim

Jihwan Hyun

Il-Soo Lee

Hye-Seong Shin

Hyo-Goon Lim

Hyeonwoo Ahn

Young-Gil Go

Jaegeol Lee

Soohwan Yoo

An adaptive continuous-time linear equalizer (CTLE) includes a CTLE cell including input terminals and output terminals, a low-pass filter configured to respectively output low-band differential signals obtained by respectively low-pass filtering differential output signals, and an error amplifier configured to amplify a difference between the low-band differential signals and output the difference as a control voltage. The CTLE cell includes first and second transistors each including an input terminal and an output terminal and an offset compensator configured to adjust a potential difference between a supply voltage source and the output terminal according to the control voltage.

Differential amplifier capable of offset compensation of differential output signal and adaptive continuous-time linear equalizer including the same

A method of adaptively training an equalizer system of a PAM-N receiver is disclosed. The method of training an equalizer system according to the present invention employs a training pattern including a first training data pattern and second training data pattern to tune the continuous-time linear equalizer, decision feedback equalizer and sampler constituting the equalizer system before use in actual communication enabling long-distance, high-speed communication.

Method of adaptively training an equalizer system of PAM-N receiver using training data patterns

A PAM-N receiver capable of adaptively adjusting threshold voltages determining a level of a received signal and a method of adaptively adjusting threshold voltages thereof are disclosed. According to the method of the present invention, the result of comparison between reference data levels and the level of data in the received signal are used to adjust the reference data levels, and the threshold voltages of a PAM-N receiver are adaptively calculated from the adjusted reference data levels, thereby reflecting transmission line conditions and Inter-Symbol Interference.

PAM-N receiver capable of adaptively adjusting threshold voltages determining level of data in received signal and method of adaptively adjusting threshold voltages of PAM-N receiver

A PAM4 receiver including an adaptive continuous-time linear equalizer and a method for training the same are disclosed. The PAM4 receiver and the method for training the same of the present invention employs a training pattern including a first training data pattern and second training data pattern to adaptively tune the PAM4 receiver to achieve accurate data reception and long-distance, high-speed communication.

PAM4 receiver including adaptive continuous-time linear equalizer and method of adaptively training the same using training data patterns

A DFE circuit for use in a semiconductor memory device and an initializing method thereof. In the method of initializing a DFE circuit used in a semiconductor memory device having a discontinuous data transmission, the DFE circuit may be used for changing a sampling reference level in response to a level of previous data and sampling transmission data. The method includes terminating a data channel having a transmission of the transmission data at a predefined termination level, and controlling a sampling start time point of the transmission data as a time point preceding a transmission time point of the transmission data by a predefined time. Further, an initialization may be performed of the previous data on the basis of initialization data obtained through a pre-sampling of the data channel at a sampling start time point of the transmission data, thereby obtaining an initialization of the DFE circuit and compensating for a feedback delay.

Decision feedback equalizer (DFE) circuits for use in a semiconductor memory device and initializing method thereof

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Gwacheon-si, South Korea

Yongsam Moon