| Preface | p. xv |
| Smart Sensor Basics | p. 1 |
| Introduction | p. 1 |
| Mechanical-Electronic Transitions in Sensing | p. 3 |
| Nature of Sensors | p. 4 |
| Integration of Micromachining and Microelectronics | p. 9 |
| Summary | p. 14 |
| References | p. 14 |
| Micromachining | p. 15 |
| Introduction | p. 15 |
| Bulk Micromachining | p. 16 |
| Silicon on Silicon Bonding | p. 19 |
| Silicon on Glass (Anodic) Bonding | p. 20 |
| Surface Micromachining | p. 20 |
| Squeeze-Film Damping | p. 22 |
| Stiction | p. 23 |
| Particulate Control | p. 23 |
| Combinations of Surface and Bulk Micromachining | p. 24 |
| Other Micromachining Techniques | p. 25 |
| LIGA Process | p. 25 |
| Dry Etching Processes | p. 25 |
| Silicon Fusion Bonding | p. 27 |
| Lasers in Micromachining | p. 28 |
| Post Etching to Obtain Smarter Structures | p. 29 |
| Other Micromachined Materials | p. 33 |
| Diamond as an Alternate Sensor Material | p. 33 |
| Metal Oxides and Piezoelectric Sensing | p. 34 |
| Films on Microstructures | p. 34 |
| Summary | p. 35 |
| References | p. 35 |
| The Nature of Semiconductor Sensor Output | p. 39 |
| Introduction | p. 39 |
| Sensor Output Characteristics | p. 39 |
| Wheatstone Bridge | p. 40 |
| Piezoresistivity in Silicon | p. 41 |
| Semiconductor Sensor Definitions | p. 43 |
| Static versus Dynamic Operation | p. 45 |
| Other Sensing Technologies | p. 46 |
| Capacitive Sensing | p. 46 |
| Piezoelectric Sensing | p. 46 |
| Hall Effect | p. 48 |
| Chemical Sensors | p. 49 |
| Improving Sensor Characteristics | p. 49 |
| Digital Output Sensors | p. 50 |
| Incremental Optical Encoders | p. 50 |
| Digital Techniques | p. 51 |
| Noise/Interference Aspects | p. 53 |
| Low-Power, Low-Voltage Sensors | p. 53 |
| Impedance | p. 54 |
| An Analysis of Sensitivity Improvement | p. 54 |
| Thin Diaphragm | p. 54 |
| Increase Diaphragm Area | p. 54 |
| Combined Solution: Micromachining and Microelectronics | p. 55 |
| Summary | p. 55 |
| References | p. 56 |
| Getting Sensor Information into the MCU | p. 57 |
| Introduction | p. 57 |
| Amplification and Signal Conditioning | p. 57 |
| Instrumentation Amplifiers | p. 59 |
| Sleep-Mode Operational Amplifier | p. 59 |
| Rail-to-Rail Operational Amplifiers | p. 60 |
| Switched-Capacitor Amplifier | p. 64 |
| Barometer Application Circuit | p. 64 |
| A 4- to 20-mA Signal Transmitter | p. 65 |
| Schmitt Trigger | p. 65 |
| Separate versus Integrated Signal Conditioning | p. 65 |
| Integrated Passive Elements | p. 68 |
| Integrated Active Elements | p. 68 |
| Digital Conversion | p. 68 |
| A/D Converters | p. 70 |
| ADC Performance | p. 72 |
| ADC Accuracy/Error Implications | p. 74 |
| Summary | p. 74 |
| References | p. 75 |
| Using MCUs/DSPs to Increase Sensor IQ | p. 77 |
| Introduction | p. 77 |
| Other IC Technologies | p. 77 |
| Logic Requirements | p. 78 |
| MCU Control | p. 79 |
| MCUs for Sensor Interface | p. 79 |
| Peripherals | p. 80 |
| Memory | p. 80 |
| I/O | p. 81 |
| Onboard A/D Conversion | p. 81 |
| Power-Saving Capability | p. 83 |
| Local Voltage or Current Regulation | p. 84 |
| Modular MCU Design | p. 85 |
| DSP Control | p. 85 |
| Algorithms versus Look-Up Tables | p. 88 |
| Techniques and Systems Considerations | p. 88 |
| Linearization | p. 89 |
| PWM Control | p. 89 |
| Autozero and Autorange | p. 90 |
| Diagnostics | p. 93 |
| EMC/RFI Reduction | p. 93 |
| Indirect (Computed not Sensed) versus Direct Sensing | p. 93 |
| Software, Tools, and Support | p. 94 |
| Sensor Integration | p. 94 |
| Summary | p. 96 |
| References | p. 97 |
| Communications for Smart Sensors | p. 99 |
| Introduction | p. 99 |
| Background and Definitions | p. 99 |
| Background | p. 101 |
| Sources (Organizations) and Standards | p. 102 |
| Automotive Protocols | p. 103 |
| SAE J1850 | p. 103 |
| CAN Protocol | p. 105 |
| Other Automotive Protocols | p. 108 |
| Industrial Networks | p. 108 |
| Industrial Usage of CAN | p. 109 |
| LonTalk Protocol | p. 110 |
| Other Industrial Protocols | p. 110 |
| Office/Building Automation | p. 111 |
| Home Automation | p. 111 |
| CEBus | p. 112 |
| LonTalk | p. 112 |
| Protocols in Silicon | p. 113 |
| MCU with Integrated SAE J1850 | p. 113 |
| MCU with Integrated CAN | p. 113 |
| Neuron Chips and LonTalk Protocol | p. 118 |
| MI-Bus | p. 119 |
| Other MCUs and Protocols | p. 120 |
| Other Aspects of Network Communications | p. 120 |
| MCU Protocols | p. 121 |
| Transition between Protocols | p. 121 |
| The Protocol as a Module | p. 122 |
| Summary | p. 123 |
| References | p. 123 |
| Control Techniques | p. 125 |
| Introduction | p. 125 |
| Programmable Logic Controllers | p. 125 |
| Open versus Closed-Loop Systems | p. 126 |
| PID Control | p. 126 |
| State Machines | p. 129 |
| Fuzzy Logic | p. 129 |
| Neural Networks | p. 133 |
| Combined Fuzzy + Neural | p. 135 |
| Adaptive Control | p. 136 |
| Other Control Areas | p. 137 |
| RISC versus CISC Architecture | p. 138 |
| Combined CISC, RISC, and DSP | p. 140 |
| Impact of Artificial Intelligence | p. 141 |
| Summary | p. 142 |
| References | p. 142 |
| Transceivers, Transponders, and Telemetry | p. 145 |
| Introduction | p. 145 |
| The RF Spectrum | p. 146 |
| Spread Spectrum | p. 148 |
| Wireless Data and Communications | p. 150 |
| Wireless Local Area Networks | p. 151 |
| Fax/Modems | p. 151 |
| Wireless Zone Sensing | p. 152 |
| Optical Signal Transmission | p. 153 |
| RF Sensing | p. 153 |
| SAW | p. 154 |
| Radar | p. 155 |
| Global Positioning System (GPS) | p. 156 |
| Remote Emissions Sensing | p. 157 |
| Remote Keyless Entry | p. 158 |
| Intelligent Transportation System | p. 159 |
| RF-ID | p. 161 |
| Other Remote Sensing | p. 162 |
| Measuring RF Signal Strength | p. 163 |
| Telemetry | p. 163 |
| Summary | p. 165 |
| References | p. 166 |
| Microelectromechanical Systems (MEMS) | p. 169 |
| Introduction | p. 169 |
| Micromachined Actuators | p. 169 |
| Microvalves | p. 170 |
| Micromotors | p. 171 |
| Micropumps | p. 173 |
| Microdynamometer | p. 175 |
| Actuators in Other Semiconductor Materials | p. 176 |
| Other Micromachined Structures | p. 176 |
| Cooling Channels | p. 176 |
| Micro-Optics | p. 177 |
| Microgripper | p. 178 |
| Microprobes | p. 179 |
| Micromirrors | p. 179 |
| Heating Elements | p. 180 |
| Thermionic Emitters | p. 180 |
| Field Emission Devices | p. 181 |
| Unfoldable Microelements | p. 182 |
| Micronozzles | p. 184 |
| Interconnects for Stacked Wafers | p. 184 |
| Summary | p. 185 |
| References | p. 185 |
| Packaging Implications of Smarter Sensors | p. 187 |
| Introduction | p. 187 |
| Semiconductor Packaging Applied to Sensors | p. 187 |
| Increased Pin Count | p. 190 |
| Hybrid Packaging | p. 191 |
| Ceramic Packaging and Ceramic Substrates | p. 191 |
| Multichip Modules | p. 191 |
| Dual-Chip Packaging | p. 193 |
| Ball Grid Array Packaging | p. 194 |
| Packaging for Monolithic Sensors | p. 195 |
| Plastic Packaging | p. 196 |
| Surface-Mount Packaging | p. 196 |
| Flip-Chip | p. 196 |
| Wafer-Level Packaging | p. 198 |
| Reliability Implications | p. 199 |
| Wafer-Level Sensor Reliability | p. 202 |
| Summary | p. 203 |
| References | p. 203 |
| Mechatronics and Sensing Systems | p. 205 |
| Introduction | p. 205 |
| Integration and Mechatronics | p. 205 |
| Smart-Power ICs | p. 206 |
| Embedded Sensing | p. 208 |
| Temperature Sensing | p. 208 |
| Current Sensing in Power ICs | p. 211 |
| Diagnostics | p. 211 |
| Sensing Arrays | p. 215 |
| Multiple Sensing Devices | p. 215 |
| Multiple Types of Sensors | p. 218 |
| An Integrated Sensing System | p. 218 |
| Other System Aspects | p. 219 |
| Batteries | p. 219 |
| Field Emission Displays | p. 220 |
| System Voltage Transients, ESD, and EMI | p. 220 |
| Summary | p. 222 |
| References | p. 222 |
| The Next Phase of Sensing Systems | p. 225 |
| Introduction | p. 225 |
| Future Semiconductor Capabilities | p. 225 |
| Future System Requirements | p. 227 |
| Not-So-Future Systems | p. 228 |
| Fabry-Perot Interferometer | p. 228 |
| HVAC Sensor Chip | p. 229 |
| Speech Recognition and Micro-Microphones | p. 230 |
| Microgyroscope | p. 231 |
| MCU with Integrated Pressure Sensor | p. 231 |
| Software, Sensing, and the System | p. 231 |
| Alternate Views of Smart Sensing | p. 236 |
| Summary | p. 236 |
| References | p. 238 |
| Smart Sensor Acronym Decoder and Glossary | p. 241 |
| About the Author | p. 259 |
| Index | p. 261 |
| Table of Contents provided by Syndetics. All Rights Reserved. |