A high-accuracy low-power current mirror with extended dynamic range

IF 1.4 4区工程技术 Q4 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE

Analog Integrated Circuits and Signal Processing Pub Date : 2025-08-21 DOI:10.1007/s10470-025-02469-y

Astha Dadheech, Nikhil Raj, Divyang Rawal

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引用次数: 0

Abstract

An amplifier-based current mirror circuit for a wide dynamic range has been presented in this paper. In the proposed work, the current mirror uses a modified Flipped Voltage Follower with a level shifter approach, incorporating a CMOS Current Differential Amplifier (CDA) as an active amplifier to enhance amplification, dynamic current range, and output swing. This current mirror design demonstrates a wide current mirroring range of up to 3 mA with minimal current transfer error (0.42%) and low input resistance of 2.69 Ω with a bandwidth of 1.038 GHz. An improved output resistance is achieved by applying a modified feedback approach at the output stage, resulting in an increase from MΩ to GΩ. The current mirror delivers a high output swing of 0.7–0.8 V, with power dissipation within the microwatt range. As an application, a first-order current mode low pass filter is realized using a proposed architecture. The performance analysis of the proposed work is supported through small signal analysis. The simulations and corner analysis are also carried using Cadence Virtuoso on UMC 180 nm technology.

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高精度低功率电流反射镜，扩展动态范围

本文提出了一种基于放大器的宽动态范围电流镜像电路。在提出的工作中，电流反射镜使用了一个带有电平移位器的改进的翻转电压跟随器，将CMOS电流差分放大器（CDA）作为有源放大器，以增强放大，动态电流范围和输出摆幅。该电流镜设计具有高达3 mA的宽电流镜像范围，电流传输误差最小（0.42%），输入电阻低至2.69 Ω，带宽为1.038 GHz。通过在输出阶段应用改进的反馈方法来实现输出电阻的改进，从而使输出电阻从MΩ增加到GΩ。电流反射镜提供0.7-0.8 V的高输出摆幅，功耗在微瓦范围内。作为一种应用，利用所提出的结构实现了一阶电流模式低通滤波器。通过小信号分析来支持所提出工作的性能分析。利用Cadence Virtuoso在UMC 180nm工艺上进行了仿真和拐角分析。

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来源期刊

Analog Integrated Circuits and Signal Processing 工程技术-工程：电子与电气

CiteScore

0.30

自引率

7.10%

发文量

141

审稿时长

7.3 months

期刊介绍： Analog Integrated Circuits and Signal Processing is an archival peer reviewed journal dedicated to the design and application of analog, radio frequency (RF), and mixed signal integrated circuits (ICs) as well as signal processing circuits and systems. It features both new research results and tutorial views and reflects the large volume of cutting-edge research activity in the worldwide field today. A partial list of topics includes analog and mixed signal interface circuits and systems; analog and RFIC design; data converters; active-RC, switched-capacitor, and continuous-time integrated filters; mixed analog/digital VLSI systems; wireless radio transceivers; clock and data recovery circuits; and high speed optoelectronic circuits and systems.