This article proposes a bit-time-dependent behavioral model of input–output (I/O) drivers for overclocking simulation. The driver behavior under overclocking conditions is investigated, and the corresponding weighting function response surface is demonstrated. In contrast to the previous approaches that use fixed timing signals extracted under normal operating conditions only, the proposed model addresses the modeling of overclocking behavior by using bit-time-dependent weighting functions (BTDWFs) along with a transition variable. The weighting coefficients can be generated appropriately for different overclocking scenarios. The corresponding model extraction flow is presented. Using the proposed BTDWFs, the driver input signal is processed during run-time by a finite state machine (FSM) algorithm which can be implemented in the widely supported hardware description languages such as Verilog-A. The proposed model is able to capture the driver’s behavior accurately under both normal operation and overclocking conditions. Its fidelity and simulation speedup are validated with modeling examples using commercial driver circuit.

中文翻译：

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用于超频分析的 I/O 驱动程序的位时间相关模型

本文提出了一种用于超频模拟的输入输出 (I/O) 驱动程序的位时间相关行为模型。研究了超频条件下的驱动器行为，并展示了相应的加权函数响应面。与之前仅使用在正常操作条件下提取的固定时序信号的方法相比，所提出的模型通过使用与位时间相关的加权函数 (BTDWF) 以及转换变量来解决超频行为的建模问题。可以针对不同的超频场景适当地生成加权系数。给出了相应的模型提取流程。使用提议的 BTDWF，驱动程序输入信号在运行时由有限状态机 (FSM) 算法处理，该算法可以在广泛支持的硬件描述语言（如 Verilog-A）中实现。所提出的模型能够在正常操作和超频条件下准确地捕捉驱动程序的行为。其保真度和仿真加速通过使用商业驱动电路的建模示例得到验证。