期刊文献+
共找到4篇文章
< 1 >
每页显示 20 50 100
A Study of Efficient Power Consumption Wireless Communication Techniques/ Modules for Internet of Things (IoT) Applications 被引量:2
1
作者 Mahmoud Shuker Mahmoud Auday A. H. Mohamad 《Advances in Internet of Things》 2016年第2期19-29,共11页
A study of wireless technologies for IoT applications in terms of power consumption has been presented in this paper. The study focuses on the importance of using low power wireless techniques and modules in IoT appli... A study of wireless technologies for IoT applications in terms of power consumption has been presented in this paper. The study focuses on the importance of using low power wireless techniques and modules in IoT applications by introducing a comparative between different low power wireless communication techniques such as ZigBee, Low Power Wi-Fi, 6LowPAN, LPWA and their modules to conserve power and longing the life for the IoT network sensors. The approach of the study is in term of protocol used and the particular module that achieve that protocol. The candidate protocols are classified according to the range of connectivity between sensor nodes. For short ranges connectivity the candidate protocols are ZigBee, 6LoWPAN and low power Wi-Fi. For long connectivity the candidate is LoRaWAN protocol. The results of the study demonstrate that the choice of module for each protocol plays a vital role in battery life due to the difference of power consumption for each module/protocol. So, the evaluation of protocols with each other depends on the module used. 展开更多
关键词 IOT Wireless Sensor Networks low Power Wireless Protocols Wireless low Power Consumption modules
下载PDF
Low modulation index RF signal detection for a passive UHF RFID transponder
2
作者 刘忠奇 张春 +1 位作者 李永明 王志华 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2009年第9期75-78,共4页
In a typical RFID system the reader transmits modulated RF power to provide both data and energy for the passive transponder. Low modulation index RF energy is preferable for an adequate tag power supply and increase ... In a typical RFID system the reader transmits modulated RF power to provide both data and energy for the passive transponder. Low modulation index RF energy is preferable for an adequate tag power supply and increase in communication range but gives rise to difficulties for near-field conventional demodulation. Therefore, a novel ASK demodulator for minimum 20% modulation index RF signal detection over a range of 23 dB is presented. Thanks to the proposed innovative divisional linear conversion from the power into voltage signal, the detection sensitivity is ensured over a wide power range with low power consumption of 8.6 μW. The chip is implemented in UMC 0.18μm mix-mode CMOS technology, and the chip area is 0.06 mm^2. 展开更多
关键词 RFID low modulation index transponder
原文传递
A single die 1.2 V 55 to 95 dB DR delta sigma ADC with configurable modulator and OSR
3
作者 武海军 李斌 +2 位作者 张华斌 李正平 曾隆月 《Journal of Semiconductors》 EI CAS CSCD 2014年第3期116-121,共6页
A single die 1.2 V multi-stage noise shaping(Mash) 2-2 delta sigma analog to digital converter(ADC)for wide applications is implemented. The configurable Mash 2-2 modulator with a new decimation filter design is p... A single die 1.2 V multi-stage noise shaping(Mash) 2-2 delta sigma analog to digital converter(ADC)for wide applications is implemented. The configurable Mash 2-2 modulator with a new decimation filter design is presented to achieve wide and high dynamic range(DR) for multiple practical applications. The novel modulator can be configured as a Mash 2-2 modulator for high precision or a 2-order modulator for low DR. The decimation filter is designed to select the OSR flexibly among cascaded integrator comb(CIC) filter and two half-band filters(HBF). The serial peripheral interface(SPI) can be used to adjust the sampling frequency and the oversampling ratio(OSR). The design was fabricated in a 0.13 m CMOS process with an area of 0.91 mm2and a total power of 5.2 mW. The measurement results show that the dynamic range(DR) of the proposed ADC can change from 55to 95 dB with the configurable OSR from 16 to 256. The spurious free dynamic range(SFDR) and signal-to-noise distortion ratio(SNDR) can get 99 dB and 86.5 dB, respectively. 展开更多
关键词 delta sigma ADC modulator low power decimation filter configurable OSR
原文传递
A 1.2-V,84-dB∑△ADM in 0.18-μm digital CMOS technology
4
作者 殷树娟 李翔宇 《Journal of Semiconductors》 EI CAS CSCD 2013年第8期90-93,共4页
A low power and low voltage∑△analog-to-digital modulator is realized with digital CMOS technology, which is due to full compensated depletion mode capacitors.Compared with mixed signal technology,this type of modula... A low power and low voltage∑△analog-to-digital modulator is realized with digital CMOS technology, which is due to full compensated depletion mode capacitors.Compared with mixed signal technology,this type of modulator is more compatible for pure digital applications.A pseudo-two-stage class-AB OTA is used in switchedcapacitor integrators for low voltage and low power.The modulator is realized in standard SMIC 0.18μm 1P6M digital CMOS technology.Measured results show that with 1.2 V supply voltage and a 6 MHz sample clock,the dynamic range of the modulator is 84 dB and the total power dissipation is 2460μW. 展开更多
关键词 digital CMOS technology low power low voltage analog-to-digital modulator sigma delta
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部