一种低功耗宽摆幅的绝对值电路设计
Design of Low-power and Wide-swing Absolute Value Circuit
祖文俊 1钟啸宇 1虞致国 1顾晓峰1
作者信息
- 1. 江南大学电子工程系物联网技术应用教育部工程研究中心,江苏无锡 214122
- 折叠
摘要
提出了一种低功耗宽摆幅的绝对值电路.该电路通过比较器输出结果判断输入电压的正负,正值利用负反馈进行保持,负值利用电压-电流转换电路和电流镜转换为正值.与传统利用二极管的设计相比,该电路避免了线性度差、功耗高的问题.基于55 nm CMOS工艺进行了电路设计,仿真结果表明,在电源电压为-1.2 V和1.2 V的条件下,电压输入摆幅高达-400～400 mV,绝对值电路误差在0.5％以内,功耗为450 μW,版图面积为4 800 μm2.
Abstract
A low power and wide swing absolute value circuit is proposed.The circuit determines the polarity of an input voltage according to the output result of a comparator.Positive values are preserved via negative feedback,whereas negative values are converted into positive values using a voltage-current conversion circuit and current mirror.Compared with traditional designs using diodes,this circuit mitigates issues such as poor linearity and high power consumption.The circuit is designed using a 55-nm CMOS process.Simulation results indicate that under supply voltages of-1.2 and 1.2 V,the voltage input swing can reach a wide range from-400 to 400 mV and an error of less than 0.5％,with power consumption of 450 μW over a layout area of 4 800 μm2.
关键词
绝对值电路/低功耗/宽摆幅/低面积开销Key words
absolute value circuit/low power/wide swing/area efficient引用本文复制引用
基金项目
长三角科技创新共同体联合攻关项目(2022CSJGG0402)
江苏省重点研发计划产业前瞻与关键核心技术项目(BE2023019-3)
出版年
2024
NETL
NSTL
万方数据