随着SoC芯片集成度和复杂度的不断提高，其测试变得越来越复杂，测试成本也越来越高，如何降低过高的测试成本也逐渐成为研究的热点。卫星数字电视信道接收芯片作为机顶盒关键芯片之一，对低成本测试的要求也越来越迫切。文章针对某卫星数字电视信道接收芯片，通过分析该芯片的内部模块功能，采用片外信号源方法设计该芯片的低成本测试方案，并在自动测试系统T6575上实现。实际生产结果表明，该方法能极大降低芯片测试成本。% With the continuously increasing in chip complexity and transistor density, the cost of chip testing is also increasing and even exceeds the cost of design and manufacturing. How to decrease the testing cost has become hot research area. Channel receiver chip of satellite digital television, as one of key components in set-top box, has growing requirement for the low cost testing. In this paper, a low cost testing scheme based on off-chip signal source is proposed by analysing the internal module, working principle and characteristics of the chip, which is implemented on ATE T6575. The results of production demonstrate that the proposed testing scheme can obviously reduce the testing cost of the chip.
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