On WDF Structure Synthesis and Simulation for Analog Circuit Emulation

• Main Authors: Ji-Xuan Tsai, 蔡季軒
• Other Authors: 周景揚
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/zu6guh

碩士 === 國立中央大學 === 電機工程學系 === 107 === With the development of semiconductor process technology, system-on-chip (SOC) has become the mainstream of design style. However, system integration and verification are still big challenges for SOC designs including digital circuits and analog circuits. FPGA emulation is a fast and low-cost solution for verifying digital circuits. For analog/mixed-signal circuits, there is still no mature emulator to solve the problem of mixed-signal verification. In this thesis, Wave Digital Filter (WDF) is adopted to map analog circuits to digital circuits for the analog circuit emulation on FPGA. Although classical WDF theory was proved as a solid method to emulate analog circuits, there is no complete and efficient approach for converting complex circuit structures into corresponding WDF structures. In this thesis, we adopt the concept of J-type adaptor to handle the loop structures of complex circuits. With the new J-type adaptor, an automatic flow is proposed to convert various analog circuits into WDF structures. Furthermore, a depth optimization algorithm is also proposed to reduce the critical path of generated WDF structures. After optimization, the WDF structure will be simulated in the proposed MATLAB environment to verify its correctness and get some useful information for the following FPGA implementation flow. As shown in the demo cases , the proposed flow is able to provide accurate WDF structures with minimized path length for those cases.