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绝对经典的模拟电路和嵌入式cpu的接口电路设计，考虑很多方面包括EMC
1 System Design 1
Dynamic Range 1
Calibration 2
Bandwidth 5
Processor Throughput 6
Avoiding Excess Speed 7
Other System Considerations 8
Sample Rate and Aliasing 11
2 Digital-to-Analog Converters 13
Analog-to-Digital Converters 15
Types of ADCs 17
Sample and Hold 26
Real Parts 29
Microprocessor Interfacing 30
Serial Interfaces 36
Multichannel ADCs 41
Internal Microcontroller ADCs 41
Codecs 42
Interrupt Rate 43
Dual-Function Pins on Microcontrollers 43
Design Checklist 45
v
Contents
3 Sensors 47
Temperature Sensors 47
Optical Sensors 59
CCDs 72
Magnetic Sensors 82
Motion/Acceleration Sensors 86
Strain Gauge 90
4 Time-Based Measurements 93
Measuring Period versus Frequency 95
Mixing 97
Voltage-to-Frequency Converters 99
Clock Resolution 102
5 Output Control Methods 103
Open-Loop Control 103
Negative Feedback and Control 103
Microprocessor-Based Systems 104
On-Off Control 105
Proportional Control 108
PID Control 110
Motor Control 123
Measuring and Analyzing Control Loops 130
6 Solenoids, Relays, and Other Analog Outputs 137
Solenoids 137
Heaters 143
Coolers 148
Fans 149
LEDs 151
7 Motors 161
Stepper Motors 161
DC Motors 180
Brushless DC Motors 184
Tradeoffs between Motors 198
Motor Torque 201
vi Contents
8 EMI 203
Ground Loops 203
ESD 208
9 High-Precision Applications 213
Input Offset Voltage 215
Input Resistance 216
Frequency Characteristics 217
Temperature Effects in Resistors 218
Voltage References 219
Temperature Effects in General 221
Noise and Grounding 222
Supply-Based References 227
10 Standard Interfaces 229
IEEE 1451.2 229
4-20 ma Current Loop 231
Appendix A: Opamp Basics 233
Four Opamp Configurations 233
General Opamp Design Equations 237
Reversing the Inputs 238
Comparators 239
Instrumentation Amplifiers 243
Appendix B: PWM 245
Why PWM? 245
Real Parts 250
Audio Applications 252 |
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创芯大讲堂
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发表于 2009-8-8 12:46:39
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