By Yongquan Fan

ISBN-10: 9048193974

ISBN-13: 9789048193974

High-Speed Serial Interface (HSSI) units became common in communications, from the embedded to high-performance computing structures, and from on-chip to a large haul. trying out of HSSIs has been a difficult subject due to sign integrity concerns, lengthy try out time and the necessity of high-priced tools. Accelerating try out, Validation and Debug of excessive pace Serial Interfaces presents leading edge try and debug techniques and specific directions on tips to arrive to functional try out of recent high-speed interfaces.

Accelerating try, Validation and Debug of excessive velocity Serial Interfaces first proposes a brand new set of rules that allows us to accomplish receiver try greater than a thousand instances speedier. Then an under-sampling established transmitter try scheme is gifted. The scheme can correctly extract the transmitter jitter and end the complete transmitter attempt inside of 100ms, whereas the try frequently takes seconds. The e-book additionally offers and exterior loopback-based trying out scheme, the place and FPGA-based BER tester and a unique jitter injection approach are proposed. those schemes could be utilized to validate, try out and debug HSSIs with information expense as much as 12.5Gbps at a decrease try fee than natural ATE recommendations. additionally, the booklet introduces an efficieng scheme to enforce excessive functionality Gaussian noise turbines, appropriate for comparing BER functionality below noise conditions.

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Extra resources for Accelerating Test, Validation and Debug of High Speed Serial Interfaces

Sample text

In addition, the VCO is undisturbed in the absence of data transitions; therefore it suppresses pattern dependent jitter. Most modern BBPD PLLs are implemented with some variations of Alexander’s phase detector [146]. Two matched flip-flops are usually used: one is driven on the rising edge of the clock while the other is driven on the failing edge of the same clock. When the PLL is locked to data, the two flip-flops sample the incoming data with both the rising edge and falling edge of the VCO clock.

This separation is nearly impossible if we do not make some assumptions and use a simple enough model to facilitate the analysis. The most popular model used is the so called “double delta” model – assuming that the only DJ is DCD, whose PDF is only comprised of a pair of delta functions [80]. 1 Introduction 49 mentary error function. The double delta assumption now serves widely as the model for modern bathtub curve fitting. Theoretically, the double delta model is not the most flexible one for arbitrary jitter profiles.

The second loop can be implemented by an integrator. We can consider the PLL being composed of two no-interacting branches – an integral branch and a bang-bang branch (or proportional branch). To keep the quality of the first order loop, it is required to keep the phase change due to the proportional branch dominating over the phase change from the integral branch. The stability factor ξ of the PLL is defined as the ratio of two phase changes [73]: ξ = ∆ θ proportina l ∆ θ int egral = 2 βτ tupdate The dual branch BBPD structure provides two degrees of freedom: the loop frequency step fbb and the stability factor ξ.

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Accelerating Test, Validation and Debug of High Speed Serial Interfaces by Yongquan Fan

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