Full-CMOS 2.4GHz LNA and VCO for ISM Band Wireless Communication 陳厚銘、王木俊
E-mail: 9223666@mail.dyu.edu.tw
ABSTRACT
In this thesis, we present a low noise amplifier and a voltage-controlled oscillator with 2.5V supply voltage for the ISM (Industrial Scientific and Medical) band heterodyne receiver. Here, the performances of the low noise amplifier and the voltage-controlled oscillator are simulated by the Advanced Design System (ADS) software with the 0.25μm CMOS process parameters. The operating frequency of the low noise amplifier is located at 2.4GHz. Because the low noise amplifier is at the first stage of a receiver, the noise figure and the gain of this amplifier circuit will dominate the performance of the noise figure of the whole receiver. Thus, the designing goals of a low noise amplifier must own high voltage gain and low noise. This low noise amplifier is principally composed of a cascode amplifier and a common-source amplifier. Design simulation results show the high gain of 21.083dB, low noise figure of 2.74dB and good impedance match. We adopted the LC tank architecture to design the voltage-controlled oscillator.
With a 2.5V supply, the tuning frequency is from 2.156GHz to 2.377GHz with 9.8% tuning range. The phase noise is
—120.3dBc/Hz at 1MHz frequency offset.
Keywords : Low noise amplifier ; Voltage-controlled oscillator ; Heterodyne receiver ; High voltage gain ; Low noise ; Cascode amplifier ; Common-source amplifi ; Phase noise
Table of Contents
Table of Contents 封面內頁 簽名頁 授權書………iii 中文摘要………
………iv 英文摘要………v 誌謝………
………vi Table of Contents………vii List of Figures
………ix List of Tables………xii Chapter I Introduction………1 1.1 The present research and development………1 1.2 Motivation
………2 1.2.1 The advantages of Bluetooth………3 1.2.2 The applications of Bluetooth………4 1.2.3 Bluetooth standards………4 Chapter II Introduction of receiver architecture…………6 2.1 Introduction………6 2.1.1 Heterodyne Receiver………
……7 2.2 Homodyne Receiver………10 2.3 Low-IF Receivers………14 Chapter III Low Noise Amplifier 3.1 Introduction………20 3.2 Parameter analysis of low noise amplifier………21 3.2.1 Noise figure………21 3.2.2 Nonlinearity effects………
……22 3.2.3 1-dB compression point………23 3.2.4 Input third-order intercept point………24 3.3 Circuit architecture of low noise amplifier………26 3.3.1 Input impedance match………26 3.3.2 Cascode amplifier………30 3.3.3 Output stage………30 3.3.4 Noise analysis of MOS device………31 3.3.5 Noise figure analysis of low noise amplifier……34 3.4 The simulation result of low noise amplifier
…………36 Chapter IV Voltage-controlled oscillator………47 4.1 Introduction………
…………47 4.2 Circuit analysis of voltage-controlled oscillator………48 4.2.1 The oscillation character of oscillator…………48 4.2.2 The negative resistance of feedback circuit……50 4.2.3 Varactor capacitor………51 4.2.4 Spiral inductor………54 4.2.5 Phase noise………58 4.3 The simulation result of the voltage-controlled oscillator………59 Chapter V Conclusion………
………63 References………64 REFERENCES
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