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首页> 外文会议>International Symposium on Circuits and Systems >Oscillation-based DFT for Second-order OTA-C Filters
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Oscillation-based DFT for Second-order OTA-C Filters

机译：基于振荡的二阶OTA-C过滤器DFT

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摘要

We propose an easily implemented and low-cost design-for-testability scheme for OTA-C filters based on an oscillation-based test (OBT) methodology. The OBT method is a vectorless output test strategy easily applicable to built-in self-test. During test mode, the filter under test is converted into an oscillator by establishing the oscillation condition in its transfer function. The oscillator frequency can be measured using digital circuitry and deviations from the cut-off frequency indicate faulty behaviour of the filter. The proposed method is suitable for both catastrophic and parametric fault diagnosis and is effective in detecting single and multiple faults. The validity of the proposed method has been verified using comparison between faulty and fault-free simulation results of two-integrator loop, Tow-Thomas and KHN OTA-C filters. Simulation results for 2nd order filters using a 0.25(mu)m CMOS technology show that the proposed oscillation-based test strategy has more than 96percent fault coverage and, with a minimum number of extra components, requires a negligible area overhead.
机译：基于基于振荡的测试（Obs）方法，我们为OTA-C滤波器提出了一种易于实现和低成本的可测试性方案。 TONG方法是一种无矢量输出测试策略，可轻松适用于内置自检。在测试模式期间，通过在其传递函数中建立振荡条件，将被测滤波器转换为振荡器。可以使用数字电路测量振荡器频率，并且与截止频率的偏差表示过滤器的故障行为。所提出的方法适用于灾难性和参数故障诊断，并且有效地检测单一和多个故障。已经使用双积分回路，托管和Khn OTA-C滤波器的故障和无故障仿真结果的比较来验证了所提出的方法的有效性。使用0.25（MU）M CMOS技术的2ND订单滤波器的仿真结果表明，所提出的基于振荡的测试策略具有超过96平方的故障覆盖，并且具有最小数量的额外组件，需要忽略不计的区域开销。

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