A 1V 16.9ppm/°C 250nA Switched-Capacitor CMOS Voltage Reference

📋 论文概要

本文提出了一种采用开关电容技术的CMOS电压参考电路，能够在1V低电源电压下工作，实现了16.9ppm/°C的低温度系数和250nA的超低功耗，解决了传统带隙电压参考需要较高电源电压的问题。

💡 主要创新点

• 采用开关电容架构替代传统电阻分压，实现了1V低电压工作，克服了带隙参考电压约1.2V的限制。
• 通过开关电容网络实现温度补偿，在极低功耗（250nA）下达到16.9ppm/°C的优良温度稳定性。

🏷 关键词

📄 原文摘要

circuits like analog-to-digital converters, voltage regulators, DRAMs, flash memories and other communication devices. The demands for smaller area, lower power consumption, and lower sensitivity to changes in supply voltage and temperature are increasing. Several voltage reference circuits were recently published that operate with low power supplies [1-4]. The challenge is that bandgap voltage references typically provide a voltage around 1.2V and then require a larger supply voltage. This problem can be solved by using resistive dividers as shown in Fig. 24.3.1(a) [1], but the structure still requires large-area diodes or parasitic BJTs with large turn-on voltages. A simple CMOS voltage reference can be based on a weighted difference between the gate-source voltages of two MOS transistors as shown in Fig. 24.3.1(b) [2

👥 作者与机构

Hong-Wei Huang1, Chun-Yu Hsieh2, Ke-Horng Chen2, Sy-Yen Kuo1, 1

National Taiwan University, Taipei, Taiwan National Chiao Tung University, Hsinchu, Taiwan 2 A precise and stable reference voltage is widely used in digital and analog