Mstar Semiconductor, Inc.

Hsin-Kuang Chen

Chun-Chia Chen

Hsian-Feng Liu

Yao-Zhong Zhang

An output driver for driving a pad includes a pull-up circuit and a pull-down circuit. The pull-up circuit includes first, second and third first-type transistors. The first and second first-type transistors are commonly controlled by a first logic signal. The third first-type transistor is connected in parallel to the second first-type transistor. The pull-down circuit includes first, second and third second-type transistors. The first and second second-type transistors are commonly controlled by a second logic signal. The third second-type transistor is connected in parallel to the second second-type transistor. The pull-up circuit is configured such that a response speed of the first first-type transistor to the first logic signal is lower than that of the second first-type transistor to the first logic signal.

Output apparatus, output driver, and level shifting system

A converter that converts a differential input signal to a single-end output signal is provided. The converter includes first, second, third and fourth transistors, and a pair of current sources. The first and second transistors are driven by the differential input signal, and have two conduction nodes coupled to each other and two conduction nodes not coupled to each other. The third and fourth transistors are driven by the differential input signal, and are connected in series with the first and second transistors. The pair of current sources, respectively connected in series with the third and fourth transistors, have a common control node coupled to the second conduction node of the first transistor. The second conduction node of the second transistor generates the single-end output signal.

Growing community of inventors

Hsinchu County, Taiwan

Hsin-Kuang Chen