A consistent nonlinear simulation environment based on improved harmonic balance techniques

Jack T. Yao, A. Yang
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Abstract

Nonlinear simulations of semiconductor networks, in both the time and the frequency domains, determine the accuracy of analog CAD tools. Conventional circuit simulators such as SPICE provide nonlinear simulation only in the time domain. Analysis outputs are often verified by the frequency-domain nonlinear harmonic balance (HB) techniques. However, inconsistency between the individually developed tools would easily invalidate this simulation/verification process. In addition, the HB algorithms also suffer from many convergence problems which exclude HB from general applications. The authors present a compiler-based design framework in association with the improved HB algorithms to provide consistent nonlinear simulations. Simulation algorithms are formulated directly on unified modeling primitives which are then used to construct device models. Application examples and simulation results are presented to demonstrate the effectiveness of the proposed methodology.<>
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基于改进谐波平衡技术的一致性非线性仿真环境
半导体网络在时域和频域的非线性仿真决定了模拟CAD工具的精度。传统的电路模拟器如SPICE只提供时域的非线性仿真。分析输出通常采用频域非线性谐波平衡(HB)技术进行验证。然而,单独开发的工具之间的不一致很容易使这个模拟/验证过程失效。此外,HB算法还存在许多收敛性问题,这使得HB无法在一般应用中应用。作者提出了一个基于编译器的设计框架与改进的HB算法相结合,以提供一致的非线性模拟。仿真算法直接在统一的建模原语上制定,然后用于构建设备模型。应用实例和仿真结果验证了该方法的有效性
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