Mstar Semiconductor, Inc.

Wen Cai Lu

Sterling Smith

Yuan Yuan

Hu Xiao

Ellen Chen Yeh

An input/output circuit includes a first switch element, a control voltage providing circuit and a floating voltage providing circuit. The first switch element includes a control terminal, a first path terminal, a second path terminal and a base terminal. The first path terminal receive a first voltage, and the second path terminal receives a second voltage. The control voltage providing circuit provides a control voltage to the control terminal of the first switch element. The floating voltage providing circuit provides the larger between the first voltage and the second voltage to the base terminal of the first switch element, so as to prevent a leakage current from being generated between the first voltage source or the second voltage source and the base terminal of the first switch element.

Input/output circuit

An eye pattern measurement apparatus includes: an eye pattern monitoring device, performing first sampling on a data signal by sequentially using scan clock signals having different phases to obtain a plurality of scan data signals; and a data aligning device, connected to the eye pattern monitoring device, receiving the scan data signals outputted by the eye pattern monitoring device, performing phase-shift on the first clock signal to generate a synchronization clock signal, synchronizing the scan data signals with the synchronization clock signal, and outputting the synchronized scan data signals.

Eye pattern measurement apparatus, and clock and data recovery system and method of the same

A processing method and electronic apparatus for a digital signal are provided. The method includes: detecting the quality of a first eye in an eye diagram of the digital signal; equalizing the digital signal; detecting the quality of a second eye in the eye diagram of the equalized digital signal; determining whether the quality of the second eye superior to the quality of the first eye by a predetermined threshold; and if so, outputting the digital signal, or else again equalizing and performing subsequent steps on the auto-compensated digital signal. The above solution is capable of effectively improving the quality of eyes in the eye diagram of the digital signal.

Processing method and electronic apparatus for digital signal

A scalable DLL (delay locked loop) circuit that has a calibration mechanism to auto tune locking precision. The delay locked loop circuit includes a multi-phase phase locked loop circuit for generating a plurality of phase signals according to a system clock, wherein one of the phase signals is a pixel clock; a phase detector for detecting an integral phase error and a fractional phase error between a reference signal and a feedback signal according to the pixel clock; a phase selector for selecting one of the phase signals according to the fractional phase error; and a delay circuit for shifting the phase of the reference signal according to the integral phase error and the selected phase signal to generate an output signal.

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Shanghai, China

Wen Cai Lu