Fast Reliability-Aware Automatic Sizing Approach for the Analog Circuits with Flexible TFTs
| Autor: | Wan-Rong Wu, 吳宛蓉 |
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| Rok vydání: | 2012 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 100 Flexible electronics are possible alternative to conventional silicon electronics for portable consumer applications with many advantages. Due to quite different properties of flexible TFTs, conventional CMOS design techniques cannot be used directly on flexible electronics. The severe parameter variations and aging effects of flexible electronics are big challenges for circuit designers, especially for sensitive analog circuits. Robust circuit design methodology is essential to implement more complex applications with flexible electronics. This thesis proposes an automatic robust optimization technique for analog circuits with flexible TFTs to deal with the severe parameter variations and aging effects. To improve both accuracy and efficiency of the circuit sizing procedure, the WCD concept is integrated into equation-based sizing approach in this work to optimize the design yield with accurate variation consideration. The different properties of flexible TFTs such as bending and severe Vt variation are considered in the optimization algorithm. Furthermore, this thesis proposes a fast approximation technique to predict the parameter aging in the circuits to consider the shifted performance in the circuit sizing procedure. As demonstrated on different cases with flexible electronics, the proposed robust optimization technique can significantly improve the fresh design yield and the lifetime yield, which solves the main difficulty of designing the analog circuits with flexible electronics. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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