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首页> 外文期刊>Electronics Letters >Ultra-low power frequency-shift keying demodulator based on injection-locking ring oscillator without using phase locked loop for wireless body area networks
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Ultra-low power frequency-shift keying demodulator based on injection-locking ring oscillator without using phase locked loop for wireless body area networks

机译：基于注入锁定环形振荡器的超低功耗移频键控解调器，无需在无线人体局域网中使用锁相环

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摘要

An ultra-low power frequency-shift keying (FSK) demodulator based on injection-locking ring oscillator for wireless body area networks is presented. The proposed system uses the power-efficient injection-locking ring oscillator (ILRO) to replace the LC oscillator which occupies much more area on chip with higher power consumption. In addition, through the ILRO, the frequency modulated input signal is converted to a full swing rectangular signal, which can be directly demodulated by a chain of down-conversion passive mixers, lowpass filters and a comparator. Power efficiency and simplicity of the proposed structure eliminate conventional FSK demodulator based on power-hungry phase locked loops, which needs to be calibrated by auto-frequency calibrator to periodically compensate the free running frequency deviations due to temperature variations and charge pump leakage current. The proposed FSK demodulator is designed and simulated in 180 nm CMOS technology while consuming only 23.37 μW from a 0.7 V supply.
机译：提出了一种基于注入锁定环形振荡器的超低功耗移频键控解调器。拟议的系统使用高能效注入锁定环形振荡器（ILRO）代替LC振荡器，后者占用了更多的芯片面积，功耗更高。此外，通过ILRO，将调频输入信号转换为全摆幅矩形信号，该信号可以由一系列下变频无源混频器，低通滤波器和比较器直接解调。功率效率高和结构简单，省去了传统的基于FSK的功率锁相环解调器，需要通过自动频率校准器对其进行校准，以定期补偿由于温度变化和电荷泵泄漏电流而产生的自由运行频率偏差。拟议的FSK解调器采用180 nm CMOS技术进行设计和仿真，而0.7 V电源仅消耗23.37μW。

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