宽温度范围低频漂移LC-DCO

2022 IEEE International Conference on Integrated Circuits, Technologies and Applications (ICTA) Pub Date : 2022-10-28 DOI:10.1109/ICTA56932.2022.9963125

Jinrui Hu, Shuyue Fang, Haigang Feng, Xinpeng Xing, Han Wang, Lei Yang

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引用次数: 0

摘要

为支持BLE等窄带系统下的频率合成器，设计了一种2.4GHz低频漂移LC-DCO。在LC-DCO中，提出了一种综合的温度补偿方案，该方案包括绝对温度比例(PTAT)电流偏置和随电压线性变化的变容管阵列，以减少温度波动导致的LC-DCO频率漂移。通过应用该电路，频率漂移从31MHz(无补偿)减少到6MHz，温度从-40°C到120°C。实验结果表明，LC储罐没有增加额外的带内噪声。采用40nm CMOS工艺技术，0.9V电源消耗860uW。

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A Low Frequency Drift LC-DCO with Wide Temperature Range

A 2.4GHz LC-DCO with low frequency drift is presented to support frequency synthesizer under narrow band system like BLE. In the LC-DCO, a comprehensive temperature compensation scheme, which includes a Proportional To Absolute Temperature (PTAT) current bias and the varactor arrays varying linearly with voltage, is proposed to reduces the frequency drift of LC-DCO as a result of temperature fluctuations. By applying the circuit, frequency drift is reduced from 31MHz (without compensation) to 6MHz within the temperature from -40°C to 120 °C. And the results show that no extra in-band noise is added to LC tank. It consumes 860uW from a 0.9V supply in 40nm CMOS process technology.

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2022 IEEE International Conference on Integrated Circuits, Technologies and Applications (ICTA)

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