Skhynix Inc.

Seoul National University

Mino Kim

Deog-Kyoon Jeong

Suhwan Kim

Jaewook Kim

Hyeong Soo Jeong

Sungphil Choi

Hyeongjun Ko

A semiconductor apparatus includes a command decoding circuit and an enable signal generation circuit. The command decoding circuit generates an operation code and a strobe pulse based on a command signal and a clock signal. The enable signal generation circuit generates a seed signal based on the operation code and the strobe pulse and generates an enable signal by shifting the seed signal. The enable signal generation circuit generates a plurality of guard keys based on a plurality of operation codes and the strobe pulse and prevents the generation of the enable signal for a predetermined time when the plurality of guard keys are not sequentially enabled.

Enable signal generation circuit and semiconductor apparatus using the same

In an embodiment, a duty cycle controller comprises a delay circuit configured to output the feedback clock signal by delaying an output clock signal combined from an input clock signal and a feedback clock signal by a predetermined delay time, wherein the delay circuit comprises a unit delay circuit configured to delay the output clock signal by a time less than the predetermined delay time and configured to delay the feedback clock signal by the predetermined delay time by letting the output clock signal pass the unit delay circuit as many as a predetermined loop count.

Duty cycle controller

In an embodiment, a unit delay circuit comprises a first path configured to delay a first input signal to output a first output signal when a selection signal is inactivated, a second path configured delay a second input signal to output a second output signal when the selection signal is inactivated, and a third path configured to delay the first input signal to output the second output signal when the selection signal is activated.

Unit delay circuit and digitally controlled delay line including the same

In an embodiment, a delay circuit comprises a delay loop controller outputting a signal obtained by operating a start signal and a delayed feedback clock signal output from outside the delay loop controller; and a loop counter configured to determine whether a predetermined delay time has elapsed since the start signal was input according to the delayed feedback clock signal and a predetermined loop count.

Delay circuit and duty cycle controller including the same

A transmitter may include a driver having a PMOS transistor and an NMOS transistor connected in series between a first power supply and a second power supply. The driver may be configured to output an output signal. The transmitter may further include a driver control circuit configured to control a gate voltage of the PMOS transistor and a gate voltage of the NMOS transistor based on a level of a data signal, an occurrence of a level transition of the data signal, and a direction of the level transition of the data signal.

Transmitter performing an equalizing operation

A receiver includes a first input buffering circuit configured to output a first signal by comparing an input signal and a first offset signal; a second input buffering circuit configured to output a second signal by comparing the input signal and a second offset signal; and a signal mixing circuit configured to output an output signal with a corrected duty ratio by combining the first signal and the second signal.

Receiver resilient to noise input

A receiver includes a signal receiving part suitable for outputting a signal corresponding to a reception signal that is received through an input terminal, and controlling a DC voltage of a signal to be outputted, according to an offset signal, an amplifying part suitable for amplifying and outputting an output of the signal receiving part, and a feedback control part suitable for controlling the offset signal according to an output of the amplifying part.

Growing community of inventors

Seoul, South Korea

Mino Kim