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A Low Duty Cycle Burst-Mode Telemeter Signal Generation Technique for VHF Insect Tracking and Its CMOS Implementation

机译:用于VHF昆虫跟踪的低占空比突发模式遥测信号生成技术及其CMOS实现

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This brief presents a new circuit design for very high-frequency (VHF) radio telemetry, to miniaturize active RFID tags for tracking small insects and bees. It reports the first CMOS insect tag implementation for generating 150-MHz burst-mode telemeter signals using employing digital approach. This design is vastly different from the present PCB-based analog VHF tag which uses bipolar transistors and large passive components. The new telemeter circuit uses a 150-MHz voltage-controlled ring-oscillator (VCRO) feeding into a cascade of frequency dividers whose outputs are combined (without requiring control logic) to generate extremely low duty-cycle burst-mode transmission signal to save power. In addition, it is the first advancement of the VHF telemeter that incorporates digital code for insect tag identification, compared with the present state-of-the-art analog methods which use small frequency shifts from a reference f(o) (similar to 150 MHz) to f(o)+ Delta f MHz for individual tag identification. In the proposed design, the strength of the modulated carrier signal is used to track the tagged insect location through the triangulation technique. A DRC and pattern-density clean chip-tag was designed for an 8-bit code at a throughput of 576 b/s, on a 28-nm CMOS process. It occupies an active layout area of 1600 mu m(2) and consumes 8.2 mu W.
机译:本简介为超高频(VHF)无线电遥测提出了一种新的电路设计,以使用于跟踪小昆虫和蜜蜂的有源RFID标签小型化。它报道了第一个使用数字方法生成150 MHz突发模式遥测信号的CMOS昆虫标签实现。这种设计与目前使用双极晶体管和大型无源元件的基于PCB的模拟VHF标签有很大不同。新的遥测电路使用一个150 MHz的电压控制环形振荡器(VCRO)馈入级联的分频器,这些分频器的输出组合在一起(不需要控制逻辑)以生成极低的占空比突发模式传输信号以节省功率。此外,这是甚高频遥测仪的第一个进步,它结合了用于昆虫标签识别的数字代码,与目前使用距参考f(o)很小的频移(类似于150)的最新模拟方法相比, MHz)到f(o)+ Delta f MHz,用于单个标签识别。在提出的设计中,调制载波信号的强度用于通过三角测量技术跟踪标记的昆虫位置。 DRC和图案密度清洁芯片标签是为28位CMOS工艺上的576b / s吞吐量的8位代码设计的。它占用1600微米(2)的有效布局面积,消耗8.2微米的功率。

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