Integrated Device Technology, Inc.

Montage Technology Co., Ltd.

Dongming Lou

Yong Wang

Xin Liu

Pengfei Hu

Junqiang Shang

Weidong Fan

Meng Mei

Ronghui Chen

The present invention relates to a method for calibrating a channel delay skew of automatic test equipment (ATE), the method comprising: providing multiple calibration reference devices, wherein the calibration reference devices have a second plurality of delay paths each having a predetermined path delay value and coupling a pair of pins of one of the calibration reference devices together, wherein each pin is coupled to at most one delay path; coupling each of the calibration reference devices with the ATE, respectively, wherein the test probe of each of the first plurality of test channels is coupled with a pin of one of the calibration reference devices; testing the calibration reference devices to obtain multiple delay measurements from one or more transmitting channels of the first plurality of test channels to one or more receiving channels of the first plurality of test channels using the ATE; and calculating based on the delay measurements.

Method for calibrating channel delay skew of automatic test equipment

A method for measuring a phase locked loop bandwidth parameter for a high-speed serial link includes the steps of initiating a jitter frequency of a clock input of a phase locked loop equal to a reference frequency with a frequency generator; determining a reference jitter amplitude value of a clock output of the phase locked loop with a waveform analyzer at the reference frequency, the reference jitter amplitude value being a function of a time interval error jitter trend of the clock output at the reference frequency; and adjusting the jitter frequency of the clock input with the frequency generator until an adjusted jitter amplitude value of the clock output reaches a goal value as determined by the waveform analyzer, the adjusted jitter amplitude being a function of a time interval error trend of the clock output at the adjusted frequency.

Method for measuring phase locked loop bandwidth parameters for high-speed serial links

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Shanghai, China

Dongming Lou