公开(公告)号：US20200007362A1

公开(公告)日：2020-01-02

申请号：US16454307

申请日：2019-06-27

Applicant: Korea University Research and Business Foundation

Inventor： Chulwoo KIM ,  Hyunsu PARK ,  Jin Cheol SIM

IPC: H04L25/49

Abstract: According to an embodiment of the inventive concept, a device for PAM-3 signaling includes an encoder selecting one of first to ninth transitions in first and second unit intervals that are successive and mapping data of three bits by using a remaining eight transitions other than the one selected among the first to ninth transitions, and an output driver receiving an output signal of the encoder via an input and generating a multi-level signal having an output voltage of first to third levels. The data of three bits is transmitted to a receiver terminal through the multi-level signal having the output voltage of the first to third levels during the first and second unit intervals that are successive. The device for PAM-3 signaling according to an embodiment of the inventive concept may transmit three bits during two unit intervals and may allow a receiver terminal to detect a windowing phenomenon.

公开(公告)号：US20200052796A1

公开(公告)日：2020-02-13

申请号：US16362066

申请日：2019-03-22

Applicant: SK hynix Inc. ,  KOREA UNIVERSITY RESEARCH AND BUSINESS FOUNDATION

Inventor： Chul Woo KIM ,  Hyun Su PARK ,  Jin Cheol SIM ,  Choong Hwan LEE

IPC: H04B10/69 ,  H03F3/08 ,  H04B10/67 ,  H03K5/13

Abstract: An optical receiver includes a transimpedance amplifier that converts a current signal corresponding to an optical signal into a voltage signal. The transimpedance amplifier includes an input terminal receiving the current signal, an output terminal outputting the voltage signal, an inverting circuit including a pull-up device that pull-up drives the voltage signal of the output terminal according to the current signal, and a pull-down device that pull-down drives the voltage signal of the output terminal according to the current signal, a feedback resistor electrically connected between the input and output terminals, a first resistor electrically connected between the input terminal and the pull-up device, and a second resistor electrically connected between the input terminal and the pull-down device.