In this paper a novel log-domain current-mode integrator based on MOS transistors in subthreshold is proposed. The integrator's time-constant is tunable by varying a reference bias current. By use of the integrato...In this paper a novel log-domain current-mode integrator based on MOS transistors in subthreshold is proposed. The integrator's time-constant is tunable by varying a reference bias current. By use of the integrator, a fifth-order Chebyshev lowpass filter with 0.1dB ripples is designed. The simulation results demonstrate that the proposed filter has such advantages as low power supply(1.5V), very low power dissipation (μW level), nearly ideal frequency response, very small sensitivity to components in passband, and adjustable cut-off frequency over a wide range.The circuit is composed of NMOS transistors and grounded capacitors which make it suitable for fully integrated circuit implementation.展开更多
A new current-mode first-order log-domain multifunction filter is presented in this paper. This filter has single input and provides three outputs (low-pass, high-pass and all-pass) using a first-order low-pass filter...A new current-mode first-order log-domain multifunction filter is presented in this paper. This filter has single input and provides three outputs (low-pass, high-pass and all-pass) using a first-order low-pass filter and five of current mirrors as building blocks. The proposed filter employs only MOSFETs and a grounded capacitor. The first-order filters are used in audio and video applications extensively. The MOSFETs of the core section are operated in weak inversion thereby making the circuit suitable for low-voltage, low-power applications. The SPICE simulations have shown good performance of the proposed filter.展开更多
随着ChatGPT的推出,大型语言模型(Large Language Models)逐渐受到关注,其在人工智能及其他领域的变革与发展中产生了深远影响。在石油行业这一传统重工业领域,大型模型的应用正逐步展开,主要涉及大语言模型和视觉大模型/多模态大模型...随着ChatGPT的推出,大型语言模型(Large Language Models)逐渐受到关注,其在人工智能及其他领域的变革与发展中产生了深远影响。在石油行业这一传统重工业领域,大型模型的应用正逐步展开,主要涉及大语言模型和视觉大模型/多模态大模型两个方面。该文提出了一种基于大语言模型的面向测井解释软件的代码自动生成方法,从测井领域知识出发,聚焦于测井曲线、表格、文档等领域性极强的内容,利用微调技术构建领域大模型,以解决石油行业在面向测井领域解释软件开发和维护中的难题。实验结果显示,该模型在通用领域表现与其他同量级模型相当,而在某测井解释软件数据集上的性能显著优于其他模型。这一研究结果表明,该模型能有效解决测井解释软件中的问题,方法具有较高的实用性。展开更多
文摘In this paper a novel log-domain current-mode integrator based on MOS transistors in subthreshold is proposed. The integrator's time-constant is tunable by varying a reference bias current. By use of the integrator, a fifth-order Chebyshev lowpass filter with 0.1dB ripples is designed. The simulation results demonstrate that the proposed filter has such advantages as low power supply(1.5V), very low power dissipation (μW level), nearly ideal frequency response, very small sensitivity to components in passband, and adjustable cut-off frequency over a wide range.The circuit is composed of NMOS transistors and grounded capacitors which make it suitable for fully integrated circuit implementation.
文摘A new current-mode first-order log-domain multifunction filter is presented in this paper. This filter has single input and provides three outputs (low-pass, high-pass and all-pass) using a first-order low-pass filter and five of current mirrors as building blocks. The proposed filter employs only MOSFETs and a grounded capacitor. The first-order filters are used in audio and video applications extensively. The MOSFETs of the core section are operated in weak inversion thereby making the circuit suitable for low-voltage, low-power applications. The SPICE simulations have shown good performance of the proposed filter.
文摘随着ChatGPT的推出,大型语言模型(Large Language Models)逐渐受到关注,其在人工智能及其他领域的变革与发展中产生了深远影响。在石油行业这一传统重工业领域,大型模型的应用正逐步展开,主要涉及大语言模型和视觉大模型/多模态大模型两个方面。该文提出了一种基于大语言模型的面向测井解释软件的代码自动生成方法,从测井领域知识出发,聚焦于测井曲线、表格、文档等领域性极强的内容,利用微调技术构建领域大模型,以解决石油行业在面向测井领域解释软件开发和维护中的难题。实验结果显示,该模型在通用领域表现与其他同量级模型相当,而在某测井解释软件数据集上的性能显著优于其他模型。这一研究结果表明,该模型能有效解决测井解释软件中的问题,方法具有较高的实用性。
