Radio Frequency Integrated Circuit Design - Webs

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Voltage-Controlled Oscillators swing downwards until the current sources start to give out. Most current sources in a bipolar technology (depending on how they are built) are happy until they hit about 0.5V or less. Let us choose a swing of about 2 � 0.8V = 1.6V swing total. If we bias the base at 1.65V and it swings down 0.8V from there, then it will sit at about 0.85V. The V BE at this point will be small,
300 Radio Frequency Integrated Circuit Design R ′cap = 2�1 + C 2 C 1� 2 3.83 pF R cap = 2�1 + 4.72 pF� 2 3.1 k� = 20.3 k� Thus, the total parallel resonator resistance is R p = 843�. V tank ≈ 2I bias� C 1 C 1 + C 2� R p I bias = V tank 2R � p C 1 + C 2 1.6V C � = 1 2(843�)� 4.72 pF + 3.83 pF 4.72 pF � = 1.71 mA The next thing to do is to size the transistors used in the tank. Transistors were chosen to be 25 �m. We can also estimate the phase noise of this oscillator. The re of the transistor at this bias is re = v T IC = 25 mV = 14.8� 1.69 mA Since this value will seriously affect our estimate, we also take into account 5� for parasitic emitter resistance (this value can be determined with a dc simulation). R re tank = 2�1 + C 1 C 2� 2 4.72 pF re = 2�1 + 3.78 pF� 2 19.8� = 200� This can be added to the existing losses of the overall resonator resistance of 843� to give 162�. Now we can compute the Q: Q = R tank√ C total L = 162� √ 1.18 pF 4nH We need to estimate the available power: PS = 2 V tank (1.6V)2 = = 7.9 mW 2R tank 2(162�) = 2.78 We can now estimate the phase noise of the oscillator. We will assume that the phase noise due to K VCO is not important.
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Radio Frequency Integrated Circuit
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Radio Frequency Integrated Circuit
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Contents Foreword xv Acknowledgment
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Contents 3.8 Base Shot Noise Discus
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Contents 5.25 Packaging 135 5.25.1
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Contents 7.12 General Design Commen
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Contents 9.5 Some Simple Image Reje
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Foreword I enjoyed reading this boo
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Foreword estimates of parasitic cap
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xx Radio Frequency Integrated Circu
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2 Radio Frequency Integrated Circui
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2 Issues in RFIC Design, Noise, Lin
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Issues in RFIC Design, Noise, Linea
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The input noise is Issues in RFIC D
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2.5 Filtering Issues Issues in RFIC
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3 A Brief Review of Technology 3.1
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A Brief Review of Technology IC = I
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3.4 Small-Signal Model A Brief Revi
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3.6 High-Frequency Effects A Brief
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A Brief Review of Technology If thi
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A Brief Review of Technology Soluti
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A Brief Review of Technology 3.8 Ba
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A Brief Review of Technology • Pi
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A Brief Review of Technology 3.16,
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A Brief Review of Technology The tr
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4 Impedance Matching 4.1 Introducti
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Impedance Matching Z 2 = Z in + j
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Figure 4.5 A Smith chart. Impedance
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4.3 Impedance Matching Impedance Ma
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Impedance Matching Figure 4.9 Which
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Impedance Matching Figure 4.11 Lowp
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Impedance Matching section, convers
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Impedance Matching Much as in the p
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Impedance Matching Note that dots i
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Impedance Matching Thus, in the fir
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Impedance Matching The exact resist
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Impedance Matching 4.10 Quality Fac
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Impedance Matching Example 4.7 Matc
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Impedance Matching line to change w
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Impedance Matching S22 = b 2 a2 | a
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Impedance Matching without the need
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96 Radio Frequency Integrated Circu
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100 Radio Frequency Integrated Circ
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Page 326 and 327: Voltage-Controlled Oscillators back
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10 Power Amplifiers 10.1 Introducti
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Power Amplifiers where G is the pow
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Power Amplifiers Figure 10.4 Optima
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Power Amplifiers Figure 10.8 Power
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Power Amplifiers Figure 10.9 Curren
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Power Amplifiers The efficiency is
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Power Amplifiers sinusoid), this pe
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Power Amplifiers Note that this agr
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Power Amplifiers stabilization. The
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Power Amplifiers Solution The first
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Power Amplifiers Figure 10.22 Class
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Figure 10.24 Class E waveforms. Pow
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Power Amplifiers B = 0.1836 0.81Q R
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Power Amplifiers Figure 10.25 Initi
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Power Amplifiers added to the funda
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Power Amplifiers 10.8.1 Variation o
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Example 10.4 Class F Power Amplifie
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Figure 10.36 Class H amplifier. Pow
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Power Amplifiers ered quite good. O
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Power Amplifiers Figure 10.39 Time-
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Figure 10.42 High-Q matching circui
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Figure 10.44 Multiple transistors.
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Power Amplifiers Figure 10.48 Combi
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Power Amplifiers have very narrow b
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Power Amplifiers Figure 10.53 Feedf
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Power Amplifiers in class A (input
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About the Authors John Rogers recei
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Index 1-dB compression point, 30-32
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Index Damped resonator, 247-48 Emit
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Index Local oscillator, 5 Mixing co
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Index Quadrature phase shift keying
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