Thạc Sĩ A low power high dynamic range broadband variable gain amplifier for an ultra wideband receiver

Thảo luận trong 'Ngoại Ngữ' bắt đầu bởi Ác Niệm, 21/12/11.

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  1. Ác Niệm

    Ác Niệm VIP Member

    TABLE OF CONTENTS

    Page
    ABSTRACT . iii
    DEDICATION . v
    ACKNOWLEDGEMENTS . vi
    TABLE OF CONTENTS . vii
    LIST OF FIGURES . ix
    LIST OF TABLES . xiii
    CHAPTER
    I INTRODUCTION 1
    II BASIC VGA STRUCTURES . 4
    II.1 VGA structures . 4
    II.1.1 Differential pair with diode-connected loads . 4
    II.1.2 Analog multiplier . 12
    II.1.3 Differential pair with source degeneration . 16
    II.1.4 Complementary differential pairs with source
    degeneration . 17
    II.2 Comparison of the commonly used VGA structures 20
    III PROGRAMMABLE CURRENT MIRROR 22
    III.1 Review of simple current mirror 22
    III.2 Proposed programmable current mirror 24
    III.2.1 AC response of programmable current mirror 29
    III.2.2 Programmability of the programmable current mirror . 35
    III.3 Conclusions . 36
    IV DESIGN CONSIDERATIONS OF THE PROPOSED VGA 38
    IV.1 VGA design challenges and motivations 38
    IV.2 System-level overview of the proposed VGA s 39
    IV.2.1 System-level design of the proposed VGA 39
    IV.2.2 Introduction of the building blocks of the proposed VGA 40
    IV.3 Detailed discussion of the VGA building blocks 43

    CHAPTER Page
    IV.3.1 Gain control scheme . 43
    IV.3.2 Input stage complementary differential pairs with source
    degeneration . 47
    IV.3.3 Current gain stage—programmable current mirror 49
    IV.3.4 Frequency compensation scheme . 51
    IV.3.5 DC offset cancellation 57
    IV.3.6 Digital control circuit 57
    IV.3.7 The dimension and bias current for the VGA . 58
    IV.4 Conclusion . 59
    V SUMMARY OF RESULTS . 60
    V.1 Design summary . 60
    V.2 Simulation setup . 60
    V.3 Simulation results . 63
    V.3.1 Explanation of simulation terminologies . 63
    V.3.2 Layout 67
    V.3.3 AC response . 68
    V.3.4 Noise 73
    V.3.5 Linearity . 75
    V.3.6 Power consumption 77
    V.4 Experimental results . 77
    V.4.1 Experimental results for the AC response of the VGA 79
    V.4.2 Experimental results of the IIP3 . 86
    V.4.3 Noise characterization 88
    V.5 Summary of results and comparison 92
    VI CONCLUSION . 95
    REFERENCES 97
    APPENDIX A . 99
    APPENDIX B 102
    VITA 107
     
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  2. klkjighk

    klkjighk New Member

    Cảm ơn vì bài viết hữu ích , phát huy nhé bạn
     

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