基于抖动的Serdes接口误码率量产测试评价方法

Evaluation Method of Bit Error Rate in Serdes Interface Based on Jitter

高速串行接口应用的普及给集成电路性能测试带来了新的挑战。误码率(BER)是衡量通信系统性能的关键指标,衡量高速Serdes接口的误码率是十分必要的。通常测试误码率时需要发送大量数据通过长时间稳定的运行,统计接收到的错误比特数来计算误码率,测试时不仅需要大量测试时间,还需在测试路径等硬件中对信号完整性进行优化,避免出现由于测试本身对结果产生影响。从误码率产生的机理出发,探寻一种高效、可靠的误码率评价方法,提出一种基于抖动(jitter)的误码率量产测试方案。

The popularization of high-speed serial interface brings new challenges to IC test. Bit error rate(BER) is a key index to measure the performance of communication system. Measuring the bit error rate of high-speed Serdes interface is very necessary. Usually, to test the bit error rate, a large amount of data needs to be sent to calculate the bit error rate with the number of error bits received by performance meter over a long period of time. The test not only needs a lot of time, but also needs to optimize the signal integrity in test path and other hardware to avoid the impact of itself on results. Starting from the mechanism of bit error rate, an efficient and reliable bit error rate test method is explored, and a jitter based mass production test scheme of bit error rate is proposed.