基于ΣΔ的直接全数字频率合成器,具有20 Mbps的调频能力和3μs的启动延迟

R. Thirunarayanan, D. Ruffieux, N. Scolari, C. Enz
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引用次数: 2

摘要

本文提出了一种全数字、直接频率合成器,可支持高达20mbps的直接调制数据速率,用于部署在多跳、可重构的无线网状网络中。此外,这个合成器可以启动在只有3个我们,这减少了能量开销,从而使其具有吸引力的占空比。通过数字操作基于Sigma-Delta调制器(SDM)输出的温度补偿FBAR振荡器信号的时移拷贝,合成器能够在很宽的范围内产生所需的频率。集成在65纳米CMOS技术中,该合成器的原型产生2.34-2.47 GHz频率。由于是完全数字化的,这个合成器只占用0.035 mm2的非常小的面积。合成器从1.1 V电源消耗3.9 mA,同时实现180 Hz的频率分辨率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A ΣΔ based direct all-digital frequency synthesizer with 20 Mbps frequency modulation capability and 3μs startup latency
This paper presents an all-digital, direct frequency synthesizer that can support direct modulation data rates up to 20 Mbps for deployment in multi-hop, reconfigurable wireless mesh networks. In addition, this synthesizer can start up in only 3 us which reduces the energy overhead, thus making it attractive for duty cycling. By digitally manipulating time-shifted copies of a temperature-compensated FBAR oscillator signal based on the outputs from a Sigma-Delta modulator (SDM), the synthesizer is able to generate the desired frequency over a wide range. Integrated in a 65 nm CMOS technology, a prototype of this synthesizer generates frequencies from 2.34-2.47 GHz. Being completely digital, this synthesizer occupies a very small area of just 0.035 mm2. The synthesizer consumes 3.9 mA from a 1.1 V supply while achieving a frequency resolution of 180 Hz.
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