Current-Mode Integrated Circuits for CMOS Mixed-Mode VLSI

本研究提出了电流模式（I- 模式）模拟集成电路。 I型电路可能 在使用低电源电压的高频率下工作， 它们处理电流，而不是像传统或 开关电容信号处理电路。 此外，I-mode 电路不需要精密线性浮动电容器， 因此对于实现混合模式信号 新兴的亚微米数字CMOS中的处理系统和/或 BiCMOS技术。 几种高速高精度电流模式技术， 在基本模拟信号处理块的设计中考虑 重点是开发适用于实施的技术 数字IC技术使用降低的电源电压。 一 高增益通用全差分电流模式操作 使用放大器拓扑，并且在一个应用中， 扩展以实现全差分开关电流滤波器 其精度可与开关电容滤波器相比。 几 还提出了时钟馈通消除方案。 最后，提出了一种新的高频连续时间电流模式 将使用过滤技术。 频率超过100兆赫 使用2 um CMOS技术似乎是可行的， 使用更先进的CMOS和/或BiCMOS 技术.

This research advances several new directions for current-mode (I- mode) analog integrated circuits. I-mode circuits potentially operate at high frequencies using low power supply voltages because they process current rather than voltage as in conventional or switched-capacitor signal processing circuits. Moreover, I-mode circuits do not require precision linear floating capacitors, and are therefore very attractive for implementing mixed-mode signal processing systems in the emerging submicron digital CMOS and/or BiCMOS technologies. Several high-speed high-accuracy current-mode techniques are considered in the design of a basic analog signal processing block with emphasis on developing techniques suitable for implementation with digital IC technologies using a reduced supply voltage. A high-gain universal fully differential current mode operational amplifier topology is being used and, in one application, is extended to implement fully differential switched-current filters with accuracy comparable to switched-capacitor filters. Several clock-feedthrough cancellation schemes are also suggested. Finally, a new high-frequency continuous time current-mode filtering technique will be used. Frequencies exceeding 100 MHZ appear feasible using a 2 um CMOS technology with higher frequencies possible using more advanced CMOS and/or BiCMOS technologies.