A transmitter includes: a pulse amplitude modulation encoder that encodes serial data to
multi-bit transmission data of a first data group and a second data group; a first driver that …

ABSTRACT A transmitter of the present disclosure includes: an output terminal; a driver that
performs transition of a voltage of the output terminal among a plurality of voltages; and a …

The present invention is directed to data communication system and methods. More
specifically, various embodiments of the present invention provide a communication …

The present invention is directed to data communication system and methods. More
specifically, various embodiments of the present invention provide a communication …

A calibration circuit includes a pad suitable for receiving calibration data that toggles, a
calibration reference voltage generation unit suitable for generating a calibration reference …

The transmitter circuit according to one embodiment includes a pulse generating circuit
generating a pulse signal based on edges of input data, a first output driver outputting …

Methods, systems, and devices that support variable modulation schemes for memory are
described. A device may switch between different modulation schemes for communication …

Related US Application Data (63) Continuation of application No. 17/123,990, filed on Dec.
16, 2020, now Pat. No. 11,381,432, which is a continuation of application No. 16/419,870 …

Methods, systems, and devices for techniques for communicating multi-level signals are
described. A first device may be configured to communicate signals with a second device …

A test device configured to test a device under test (DUT) performing an interface of a pulse
amplitude modulation (PAM) operation includes a logic generation/determination device …