基于gm/ID方法的低电压数控振荡器设计

2015 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT) Pub Date : 2015-08-01 DOI:10.1109/RFIT.2015.7377929

Jungnam Bae, Saichandrateja Radhapuram, Ikkyun Jo, T. Kihara, T. Matsuoka

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引用次数: 5

摘要

设计了一种用于医疗植入物通信服务(MICS)频段的低压数字控制振荡器(DCO)。基于gm/ID优化方法，设计了工作在亚阈值区域的DCO核心。振荡频率由数字逻辑块调谐。采用数据加权平均的温度计编码器和δ - σ调制器(DSM)实现频率调谐。通过使用DSM实现了高频率分辨率。采用130纳米CMOS技术制造的DCO在200 kHz偏置频率下实现了-115.3 dBc/Hz的相位噪声，MICS频段的调谐范围为382 MHz至412 MHz。电源电压为0.7 v，功耗为840 μW，频率分辨率为18 kHz。

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A low-voltage design of digitally-controlled oscillator based on the gm/ID methodology

A low-voltage digitally-controlled oscillator (DCO) utilized in a medical implant communication service (MICS) frequency band is designed. A DCO core operating in sub-threshold region is designed based on the gm/ID methodology for optimization. The oscillation frequency is tuned by digital logic block. Thermometer coder with data-weighted averaging and delta-sigma modulator (DSM) are implemented for frequency tuning. High frequency resolution is achieved by using the DSM. The DCO fabricated in a 130-nm CMOS technology has achieved a phase noise of -115.3 dBc/Hz at 200 kHz offset frequency with tuning range of 382 MHz to 412 MHz for the MICS band. It consumes 840 μW from a 0.7-V supply voltage and has a high frequency resolution of 18 kHz.

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2015 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT)

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