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Low-Power Analog Baseband Circuits for Wake-Up Receivers

Title
Low-Power Analog Baseband Circuits for Wake-Up Receivers
Translated Title
Wake-Up 수신기를 위한 저전력 기저 대역 아날로그 회로 설계
Authors
Baik, Seung Yeob
DGIST Authors
Baik, Seung Yeob; Lee, Jung Hyup; Je, Min Kyu
Advisor(s)
Lee, Jung Hyup
Co-Advisor(s)
Je, Min Kyu
Issue Date
2017
Available Date
2017-01-18
Degree Date
2017. 2
Type
Thesis
Keywords
Wake up receiverBasebandEnvelope detectorProgrammable gain amplifierComparatorWake up 수신기기저 대역포락선 검출기증폭기비교기
Abstract
Wireless sensor networks require ultra-low power consumption. To avoid wasting power consumption, wake up receiver system is applied to main receiver system. The wake up receiver continuously watch a wake up signal from other nodes. If it detects a wake up signal, it activates the main receiver to receive data. The baseband circuit for wake up receiver is composed of envelope detector, programmable gain amplifier and comparator. The enveloped detector converts the high frequency signal to baseband signal. The output signal of envelope detector is amplified through the programmable gain amplifier suitably. The comparator determines that the output signal of the programmable gain amplifier is high or low. This baseband circuit uses fully differential structure to strong from environment noise and coupling noise. The gain of programmable gain amplifier is defined by the ratio of capacitor value through negative feedback network. Moreover, the comparator not only consume power only when the input signal cross the threshold voltage, but also apply a replica biasing circuit with negative feedback to achieve low power consumption and be strong from PVT variation. This system is designed in 180nm technology and the total current consumption is under 14μA, when the supply voltage is 1.8V. ⓒ 2017 DGIST
Table Of Contents
I. Introduction 1 -- II. Envelope Detector 5 -- 2.1 Conventional envelope detector 5 -- 2.2 Fully differential envelope detector 7 -- 2.3 Conversion gain of fully differential envelope detector 11 -- III. Programmable Gain Amplifier 13 -- 3.1 Operational trans-conductance amplifier 13 -- 3.2 Fully differential amplifier 16 -- 3.3 Resistive feedback 18 -- 3.4 Capacitive feedback 23 -- 3.5 Noise Analysis 26 -- 3.6 Apply chopper stabilization technique 26 -- IV. Comparator 30 -- 4.1 Threshold inverter quantizer 30 -- 4.2 Inverter based fully differential comparator with replica biasing 32 -- V. Conclusion 35
URI
http://dgist.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002326991
http://hdl.handle.net/20.500.11750/1500
DOI
10.22677/thesis.2326991
Degree
Master
Department
Information and Communication Engineering
University
DGIST
Files:
Collection:
Information and Communication EngineeringThesesMaster


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