Korea University Research and Business Foundation

Skhynix Inc.

Jin Cheol Sim

Chulwoo Kim

Chul Woo Kim

Hyunsu Park

Hyun Su Park

Choong Hwan Lee

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.

Pulse amplitude modulation-3 transceiver and operation method thereof

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.

Optical receiver

Growing community of inventors

Seoul, South Korea

Jin Cheol Sim