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1 | (24) |
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1 | (1) |
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1.2 An Overview of Analog Circuits and Their Applications |
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2 | (1) |
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1.3 The Ubiquitous Op-Amp: The Drawbacks and Limitations of Some Op-Amp Circuits |
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3 | (6) |
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1.3.1 Op-Amp Circuits Which Employ More Than the Minimum Number of Resistors and Require Passive Component-Matching |
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3 | (4) |
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1.3.2 The Gain-Bandwidth Conflict |
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7 | (1) |
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1.3.3 Slew-Rate Based Limitations |
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8 | (1) |
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1.4 A Brief Review of the Evolution of Alternative Analog Circuit Building Blocks |
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9 | (11) |
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1.4.1 The Operational Transconductance Amplifiers |
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9 | (2) |
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1.4.2 The Current Conveyors |
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11 | (3) |
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1.4.3 The Current Feedback Op-Amp (CFOA) |
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14 | (1) |
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1.4.4 The Operational Trans-resistance Amplifier |
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15 | (2) |
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1.4.5 The Four-Terminal-Floating-Nullor |
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17 | (1) |
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1.4.6 The Current Differencing Buffered Amplifier |
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18 | (1) |
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1.4.7 The Current Differencing Transconductance Amplifier (CDTA) |
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19 | (1) |
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1.5 The Necessity and the Scope of the Present Monograph |
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20 | (5) |
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21 | (4) |
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2 CFOAs: Merits, Demerits, Basic Circuits and Available Varieties |
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25 | (24) |
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25 | (1) |
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2.2 AD844: The CFOA with Externally-Accessible Compensation Pin |
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25 | (3) |
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2.3 The Merits and the Advantageous Features of the CFOAs |
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28 | (3) |
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2.3.1 The Reason and the Origin of the High Slew Rate |
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28 | (2) |
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2.3.2 De-coupling of Gain and Bandwidth: Realisability of Variable-Gain, Constant-Bandwidth Amplifiers |
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30 | (1) |
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2.4 The Demerits and Limitations of CFOAs |
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31 | (1) |
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31 | (1) |
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2.4.2 Difficulties with Capacitive Feedback |
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32 | (1) |
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2.4.3 Effect of Stray Capacitances and Layout Issues |
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32 | (1) |
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2.5 Basic Circuits Using CFOAs |
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32 | (10) |
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2.5.1 VCVS Configurations |
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32 | (2) |
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2.5.2 Instrumentation Amplifier Using CFOAs |
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34 | (1) |
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2.5.3 VCCS, CCVS and CCCS Configurations |
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35 | (1) |
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2.5.4 Unity Gain Voltage and Current Followers |
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36 | (1) |
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2.5.5 Integrators and Differentiators |
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36 | (6) |
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2.6 Commercially Available Varieties of CFOAs |
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42 | (5) |
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2.6.1 The Mixed-Translinear-Cells (MTC) as Building Blocks of CFOAs |
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42 | (2) |
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2.6.2 Elantec Dual/Quad EL2260/EL2460 |
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44 | (1) |
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44 | (1) |
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2.6.4 AD8011 from Analog Devices |
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45 | (1) |
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2.6.5 THS 3001 from Texas Instruments Inc |
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46 | (1) |
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47 | (2) |
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48 | (1) |
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3 Simulation of Inductors and Other Types of Impedances Using CFOAs |
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49 | (32) |
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49 | (1) |
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3.2 An Overview of Op-Amp-RC Circuits for Grounded and Floating Inductor Simulation and Their Limitations |
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49 | (5) |
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3.3 Realization of Gyrator and Grounded Impedances Using CFOAs |
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54 | (2) |
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3.4 Single-CFOA-Based Grounded Impedance Simulators |
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56 | (4) |
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3.4.1 Lossy Grounded Inductors/FDNRs |
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57 | (3) |
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3.4.2 Single-CFOA-Based Grounded Negative Capacitance and Negative Inductance Simulators |
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60 | (1) |
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3.5 Floating Inductors and Floating Generalized impedance Simulators Using CFOAs |
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60 | (5) |
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3.6 Floating Inductance Circuits Employing Only Two CFOAs |
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65 | (3) |
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3.6.1 Lossless/Lossy Floating Inductance Simulator |
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65 | (2) |
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3.6.2 A Lossy Floating Inductance Simulator |
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67 | (1) |
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3.7 Applications of Simulated Impedances in Active Filter Designs |
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68 | (3) |
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3.7.1 Applications in the Design of Second Order Filters |
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68 | (1) |
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3.7.2 Application in the Design of Higher Order Filters |
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69 | (2) |
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3.8 Realization of Voltage-Controlled Impedances |
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71 | (6) |
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3.8.1 Grounded Voltage Controlled Impedance Simulators |
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72 | (1) |
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3.8.2 Floating Voltage Controlled Impedance Simulators |
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73 | (4) |
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77 | (4) |
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78 | (3) |
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4 Design of Filters Using CFOAs |
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81 | (50) |
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81 | (1) |
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4.2 The Five Generic Filter Types, Their Frequency Responses and Parameters |
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82 | (1) |
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4.3 Voltage-Mode/Current-Mode Biquads Using CFOAs |
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83 | (24) |
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4.3.1 Dual Function VM Biquads |
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83 | (1) |
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4.3.2 Single Input Multiple Output (SIMO) Type VM Biquads |
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84 | (7) |
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4.3.3 Multiple Input Single Output (MISO) Type VM Biquads |
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91 | (8) |
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4.3.4 MISO-Type Universal Current-Mode (CM) Biquads |
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99 | (1) |
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4.3.5 Dual-Mode Universal Biquads Using Single CFOA |
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100 | (3) |
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4.3.6 Mixed-Mode Universal Biquads |
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103 | (4) |
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4.4 Active-R Multifunction VM Biquads |
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107 | (3) |
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4.5 Inverse Active Filters Using CFOAs |
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110 | (2) |
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4.6 MOSFET-C Filters Employing CFOAs |
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112 | (6) |
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4.6.1 MOSFET-C Fully Differential Integrators |
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113 | (2) |
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4.6.2 MOSFET-C Fully Differential Biquads |
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115 | (1) |
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4.6.3 MOSFET-C Single-Ended Biquad |
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116 | (2) |
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4.7 Design of Higher Order Filters Using CFOAs |
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118 | (8) |
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4.7.1 Signal Flow Graph Based Synthesis of nth Order Transfer Function Using CFOAs |
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119 | (1) |
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4.7.2 Doubly Terminated Wave Active Filters Employing CFOA-Based on LC Ladder Prototypes |
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119 | (1) |
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4.7.3 Higher Order Modular Filter Structures Using CFOAs |
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119 | (7) |
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126 | (5) |
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127 | (4) |
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5 Synthesis of Sinusoidal Oscillators Using CFOAs |
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131 | (50) |
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131 | (1) |
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5.2 The Evolution of Single Element Controlled Oscillators: A Historical Perspective |
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131 | (2) |
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5.3 Advantages of Realizing Wien Bridge Oscillator Using CFOA vis-a-vis VOA |
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133 | (1) |
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5.4 Single-Resistance-Controlled Oscillators (SRCO) Using a Single CFOA |
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134 | (6) |
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5.4.1 A Novel SRCO Employing Grounded Capacitors |
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138 | (2) |
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5.5 Two-CFOA-Two-GC SRCOs: The Systematic State Variable Synthesis |
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140 | (3) |
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5.6 Other Two-CFOA Sinusoidal Oscillator Topologies |
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143 | (5) |
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5.7 Design of Active-R SRCOs |
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148 | (4) |
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5.7.1 Active-R Sinusoidal Oscillators Using CFOA-Pole |
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148 | (1) |
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5.7.2 Low-Component-Count CFOA-Pole Based Active-R SRCOs |
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149 | (1) |
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5.7.3 Other Two-CFOA Based Active-R SRCOs |
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150 | (1) |
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5.7.4 CFOA-Pole-Based RC Oscillator |
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150 | (1) |
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5.7.5 A Simple Multiphase Active-R Oscillator Using CFOA Poles |
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151 | (1) |
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5.8 SRCOs Providing Explicit Current Output |
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152 | (5) |
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5.9 Fully-Uncoupled SRCOs Using CFOAs |
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157 | (4) |
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5.10 Voltage-Controlled-Oscillators Using CFOAs and FET-Based VCRs |
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161 | (1) |
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5.11 State-Variable Synthesis of Linear VCOs Using CFOAs |
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161 | (7) |
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5.12 Synthesis of Single-CFOA-Based VCOs Incorporating the Voltage Summing Property of Analog Multipliers |
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168 | (5) |
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5.13 MOSFET-C Sinusoidal Oscillator |
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173 | (2) |
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175 | (6) |
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176 | (5) |
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6 Miscellaneous Linear and Nonlinear Applications of CFOAs |
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181 | (20) |
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181 | (1) |
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6.2 Electronically-Variable-Gain Amplifier |
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181 | (1) |
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6.3 Cable Driver Using CFOA |
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182 | (1) |
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6.4 Video Distribution Amplifier |
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182 | (1) |
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6.5 Schmitt Triggers and Non-sinusoidal Waveform Generators |
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183 | (6) |
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189 | (1) |
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6.7 Analog Squaring Circuit |
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190 | (1) |
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191 | (1) |
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6.9 Pseudo-exponential Circuits |
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192 | (1) |
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6.10 Chaotic Oscillators Using CFOAs |
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193 | (5) |
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198 | (3) |
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198 | (3) |
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7 Realization of Other Building Blocks Using CFOAs |
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201 | (22) |
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201 | (1) |
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7.2 Applications of the CFOAs in Realizing Other Building Blocks |
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201 | (12) |
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7.2.1 CFOA Realizations of Various Kinds of Current Conveyors (CC) |
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202 | (2) |
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7.2.2 CFOA-Realization of the Four-Terminal-Floating-Nullors (FTFN) |
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204 | (1) |
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7.2.3 CFOA Realization of Operational Trans-resistance Amplifier (OTRA) |
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205 | (2) |
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7.2.4 CFOA Realization of Current Differencing Buffered Amplifier (CDBA) Based Circuits |
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207 | (1) |
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7.2.5 CFOA Realization of Circuits Containing Unity Gain Cells |
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208 | (2) |
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7.2.6 Current Differencing Transconductance Amplifier (CDTA) |
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210 | (1) |
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7.2.7 Current Follower Transconductance Amplifiers (CFTA) |
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211 | (1) |
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7.2.8 Current Controlled Current Conveyor Transconductance Amplifier (CCCC-TA) |
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211 | (1) |
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7.2.9 Differential Input Buffered Transconductance Amplifier (DBTA) |
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212 | (1) |
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7.2.10 Voltage Differencing Differential Input Buffered Amplifier (VD-DIBA) |
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213 | (1) |
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213 | (10) |
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214 | (9) |
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8 Advances in the Design of Bipolar/CMOS CFOAs and Future Directions of Research on CFOAs |
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223 | (18) |
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223 | (1) |
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8.2 Progress in the Design of Bipolar CFOAs |
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223 | (4) |
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8.2.1 Bipolar CFOA with Improved CMRR |
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223 | (1) |
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8.2.2 Bipolar CFOA with Higher Gain Accuracy, Lower DC Offset Voltage and Higher CMRR |
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224 | (1) |
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8.2.3 Bipolar CFOA Architectures with New Types of Input Stages |
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225 | (2) |
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8.2.4 Novel CFOA Architecture Using a New Current Mirror Formulation |
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227 | (1) |
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8.3 The Evolution of CMOS CFOAs |
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227 | (5) |
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8.3.1 CMOS CFOA with Rail-to-Rail Swing Capability |
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229 | (1) |
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8.3.2 CMOS CFOA for Low-Voltage Applications |
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229 | (1) |
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8.3.3 Fully-Differential CMOS CFOAs |
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229 | (1) |
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8.3.4 CMOS CFOAs with Increased Slew Rate and Better Drive Capability |
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230 | (1) |
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8.3.5 Other CMOS CFOA Architectures |
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231 | (1) |
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8.4 Various Modified Forms of CFOAs and Related Advances |
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232 | (5) |
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232 | (1) |
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8.4.2 Current-Controlled CFOA |
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232 | (1) |
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8.4.3 Current Feedback Conveyor |
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233 | (1) |
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8.4.4 The Differential Voltage Current Feedback Amplifier |
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233 | (2) |
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8.4.5 Differential Difference Complementary Current Feedback Amplifier |
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235 | (2) |
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8.5 Future Directions of Research on CFOAs and Their Applications |
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237 | (1) |
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237 | (4) |
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238 | (3) |
References for Additional Reading |
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241 | (2) |
About the Authors |
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243 | (4) |
Index |
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247 | |