CMOS Optical Preamplifier Design Using Graphical Circuit Analysis

More documents

Recommendations

Info

i in 5.1 <strong>Analysis</strong> of the Low-Voltage Transimpedance Amplifier 110 feedback that is associated with the common-gate configuration of M 1, L2 , the feedback loop that extends from the input terminal to the gate of through , and L3 , the feedback loop around M 3 through resistor R f . The presence of overlapping feedback loops makes this structure difficult for analysis using conventional feedback techniques. i in – ( + ) g m1 Z in g s1 v in ( + ) 1 – Y A gm1 + gs1 – gm2 Y f Y f Y f M 2 vA ( Y f + Y L) 1 – – gm3 Figure 5.3 Signal-flow graph of optical preamplifier superimposed on circuit schematic. – ( + gm1 + gs1 ) i scin g m1 L 1 g s1 – 1 Y in v in i scA ( + ) 1 – L 2 – gm2 Y A Y f Figure 5.4 Signal-flow graph of preamplifier highlighting the existing feedback loops. Y f L3 – gm3 + Y f i scout v out vA ( Y f + Y L) 1 – v out M 1
5.1 <strong>Analysis</strong> of the Low-Voltage Transimpedance Amplifier 111 The transimpedance gain of the circuit can be determined using Mason’s Direct Rule. The basic expression is v out -------- i in where P1 is the forward transmission path from iin to vout , P 1 and loops L1 , L2 , and L3 are given by (5.5) (5.6) (5.7) (5.8) (5.9) By combining Equations (5.1) through (5.9), we can obtain the following expression for the transimpedance gain: v out P1∆1 = --------------------------------------------------------------------- 1 – ( L1 + L2 + L3) + L1L 3 L 3 ( gm1 + gs1 ) ( – gm3 + Y f ) = --------------------------------------------------------------- Y in( Y A + Y f ) ( Y f + Y L) where the coefficients of the denominator are given by a 3 a 2 L 2 L 1 – ( ) = -------------------------------- gm1 + gs1 Y in ( ) = ------------------------------------------ – gm2 gm1 + gs1 Y in( Y A + Y f ) ( – gm3 + Y f )Yf ( Y A + Y f ) Y f + Y L = ----------------------------------------------------- ( ) 1 ⁄ R f + sC f – gm3 -------- ( s) iin a3s 3 a2s 2 = ---------------------------------------------------------- + + a1s + a0 Cin gm1 + gs1 = ----------------------------- [ C AC L + C f ( C A + CL) ] ( ) Cin gm1 + gs1 ⎛ C A + CL⎞ = ------------------------ ⎜gm3Cf+ --------------------- ⎟ + C AC L + C f ( C A + CL) ⎝ ⎠ R f a1 = Cingm3 ------------------------------------ ( gm1 + gs1)Rf + gm2C L + ( gm2 + gm3)Cf C A + CL + --------------------- R f a0 = ( gm2 + gm3) ⁄ R f (5.10)
Page 1 and 2:
CMOS Optical Preamplifier Design Us
Page 3 and 4:
To achieve low-voltage operation, w
Page 5 and 6:
Table of Contents CHAPTER 1 INTRODU
Page 7 and 8:
CHAPTER 1 1.1 OVERVIEW Introduction
Page 9 and 10:
Information Source Modulator Drive
Page 11 and 12:
1.2 Thesis Outline 5 [Ohhata,1999].
Page 13 and 14:
1.2 Thesis Outline 7 technique call
Page 15 and 16:
1.2 Thesis Outline 9 Detector in St
Page 17 and 18:
E e + - V bias 2.1 Photodetectors 1
Page 19 and 20:
Diode Capacitance (pF) Diode capaci
Page 21 and 22:
2.2 Optical Preamplifier Structures
Page 23 and 24:
2.3 Transimpedance Amplifier Design
Page 25 and 26:
Page 27 and 28:
I dc 2.3 Transimpedance Amplifier D
Page 29 and 30:
Page 31 and 32:
Source Figure 2.11 General structur
Page 33 and 34:
A = = For = 1V , the solution is v
Page 35 and 36:
The gain of the forward amplifier c
Page 37 and 38:
Feedback Analysis Using Return Rati
Page 39 and 40:
2.4 Circuit Analysis Techniques 33
Page 41 and 42:
2.5 An Overview of Signal-Flow Grap
Page 43 and 44:
1 x1 x2 2.5 An Overview of Signal-F
Page 45 and 46:
2.6 SUMMARY REFERENCES • ∆ k =
Page 47 and 48:
Symp. Circuits Systems, vol. 3, pp.
Page 49 and 50:
CHAPTER 3 New Transimpedance Amplif
Page 51 and 52:
3.1 A Differential Transimpedance A
Page 53 and 54:
Page 55 and 56:
Page 57 and 58:
3.2 A Feedback Topology for Ambient
Page 59 and 60:
3.2 A Feedback Topology for Ambient
Page 61 and 62:
Transimpedance (dBΩ) 90 80 60 40
Page 63 and 64:
3.3 A Low-Voltage Transimpedance Am
Page 65 and 66: 3.3 A Low-Voltage Transimpedance Am
Page 73 and 74: C 3 Φ1VB M 3 V B- =0.7V M 7 Figure
Page 77 and 78: 3.4 SUMMARY 3.4 Summary 71 In this
Page 79 and 80: 3.4 Summary 73 Y. Nakagome et al.,
Page 81 and 82: 4.1 Introduction 75 back topology o
Page 83 and 84: 4.2 Circuit Analysis Using Driving-
Page 91 and 92: 4.3 DPI/SFG: Combining DPI Analysis
Page 93 and 94: 4.4 Determining Port Impedances 87
Page 95 and 96: v i R in v o R out 4.4 Determining
Page 97 and 98: id » ro and 1 ⁄ rid « Av ⁄ ro
Page 103 and 104: Z b r e g m 4.5 Analyzing Transisto
Page 105 and 106: 4.5 Analyzing Transistor Circuits 9
Page 107 and 108: Figure 4.25 SFG for the source foll
Page 115: 5.1 Analysis of the Low-Voltage Tra
Page 119 and 120: 5.2 DEVELOPING AN ANALYTIC CIRCUIT
Page 121 and 122: Z in 5.2 Developing an Analytic Cir
Page 123 and 124: 5.2 Developing an Analytic Circuit
Page 125 and 126: I n1 : i in I n2 -I n1 i scin ( sCi
Page 129 and 130: I nRf : 5.2 Developing an Analytic
Page 131 and 132: DC transimpedance gain: Pole locati
Page 133 and 134: Frequency (MHz) 500 450 400 350 300
Page 135 and 136: Pole frequencies(MHz) 500 450 400 3
Page 137 and 138: Optimizing Sensitivity 5.2 Developi
Page 141 and 142: Transimpedance Volts dB (lin) Gain
Page 143 and 144: CHAPTER 6 Implementation and Experi
Page 145 and 146: 6.1 A 1V Optical Receiver Front-End
Page 149 and 150: 6.1.2 Experimental Results 6.1 A 1V
Page 151 and 152: Gain(dB) 0 −1 −2 −3 −4 −5
Page 159 and 160: Clock signal of voltage doubler Eye
Page 161 and 162: 6.2 Variable-Gain Transimpedance Am
Page 163 and 164: 6.2.2 Experimental Results 6.2 Vari
Page 165 and 166: 6.3 Summary and State-of-the-Art Co
Page 167 and 168:
Reference Outputs Technology Supply
Page 169 and 170:
CHAPTER 7 Conclusions 7.1 SUMMARY A
Page 171 and 172:
7.2 Future Work 165 The significanc
Page 173 and 174:
7.2 Future Work 167 supply and subs
Page 175 and 176:
v s i ti that part of the SFG for Q
Page 177 and 178:
Thus, P1 ′ = b = 500Ω ∆1 ′
Page 179 and 180:
itive representation of circuit dyn
Page 181 and 182:
Bipolar Transistor i scb Z b v b b
show all

CMOS Optical Preamplifier Design Using Graphical Circuit Analysis

Create successful ePaper yourself

Delete template?

Save as template?