《notes on analog-digital conversion techniques》求取 ⇩

ChapterⅠINTRODUCTION1

A.Systems with Digital Information-Processing Equipment1

1.Data-Reduction System2

2.Programmed Control System3

3.Conrtol System Containing a Digital Computer4

B.Systems Considerations in the Design of Conversion Equipment6

1.Holding Requirements6

2.Choice of Code8

3.Conversion Time9

4.Complexity of Equipment9

5.Reliability11

C.Organization of Notes13

ChapterⅡSAMPLING AND QUANTIZING15

A.The Theory of sampling16

1.The Sampling Theorem for Sinusoids16

2.The Sampling Theorem18

3.Example of Misapplication of Sampling Theorem21

4.Linear Systems and Convolution24

5.The System Transfer Function28

6.Sampling as Impulse Modulation29

7.Recovery of a Signal from its Samples33

8.The z-Transform36

9.Sampled Data System Analysis Techniques40

10.Example of System Analysis43

11.Choice of Sampling Rate48

B.Theory of Quantizing49

1.Distrbution Functions and First-Order Statistics49

2.Distribution of Sun of Independent Variables54

3.Characteristic Functions56

4.Quantization as Area Sampling58

5.The Quantizing Theorem60

6.Recovery of Staistics from a Quantized Signal63

7.An Approximate Criterion for Quantizing Width65

8.Favorite Values67

9.Quantizer System Analysis70

10.Example of System Analysis72

C.Some Additional Aspects of Sampling and Quantizing73

1.Approximation to Impulse Modulation73

2.Errors in Quantizing74

3.Errors in Sanpling76

4.Number of Samples,Stability of Means78

5.Frequency Resolution82

D.Concluding Remarks86

ChapterⅢ CODES93

A.Positional Notation93

B.Conversion Between Radix Systems95

C.Octal to Binary Conversion96

D.Binary Arithmetic97

E.Binary-Coded Decimal Numbers97

F.Unit-Distance Codes102

G.Self-Checking and Self-Correcting Codes109

ChapterⅣDIGITAL CIRCUITS115

A.And Circuits(Gates)117

B.Or Circuit(Mising Circuit)119

C.Flip-Flops121

1.Crossover Capacitors123

2.Triggering of Flip-Filps127

3.Use of Self Bias129

D.Code Converter129

E.Delay Elements132

F.Counters135

1.Flip-Flops as Binary Counters135

2.Decimal Counters136

3.Reversible Counter139

G.Selection Circuits141

1.Selection Trees141

2.Diode Matrix143

H.Magnetic Shift Register149

1.Magnetic Cores150

2.Double-Line Shift Register154

3.Single-Line Shift Register156

ChapterⅤCODING AND DECODING TECHNIQUES FOR ELECTRICAL SIGNALS161

A.Coding by Intermediate Conversion to a Time Interval162

1.Anodige162

2.Sawtooth-Comparison Coder170

B.Decoding by Intermediate Conversion to a Time Interval179

1.Operation179

2.Characteristics183

C.Incremental Phase-Shift Decoder183

1.Operation185

2.Characteristics186

D.Decoding Networks189

1.Decoder With Ladder NetworkⅠ189

2.Decoder With Ladder NetworkⅡ192

3.Decoder With Ladder NetworkⅢ195

4.Decoder With Weighted ResistorsⅠ195

5.Decoder With Weighted ResistorsⅡ206

6.Decoder With Weighted ResistorsⅢ208

7.The Shannon-Rack Decoder211

E.Coding by Comparison214

F.Coding by Cascaded Stages216

G.Coding Tube220

H.Sampling and Holding222

ChapterⅥCODING AND DECODING TECHNIQUES FOR TRANSLATIONAL AND ANGULAR MOTION225

A.Claddification226

B.General Remarks on Transducers227

C.Coding by Intermediate Conversion to Voltage or Time Analog231

1.Voltage Transducers231

2.Phase Shift Coders232

D.Incremental Pattern Devices245

1.Slotted Disc246

2.Incremental Commutator248

3.Magnetic Incremental Disc253

4.Coding Translational Motion with Optical Gratings255

5.Magnetic Drum Coder255

6.Incremental Position Decoders259

E.Coded Pattern Devices264

1.Logical Reading Methods for Natural Binary Code269

2.Reflected Binary Codes279

3.Multispeed Binary Coders284

4.Decimal Coders288

5.Codes for Spesial Functions293

F.Conpling Coders to Other Components297

1.Direct Coupling297

2.Geared Coupling302

3.Use of Repeater Servos306

ChapterⅦ DESIGN OF A DIGITAL INSTUMENTATION SYSTEM313

A.A Fire-Control Evaluation Problem313

B.Data Requirements and Coding314

C.Data Handling and Storage316

1.Computer Considerations316

2.Temporary Storage319

3.DFTI System Block Diagram322

4.Features of Computer Data Reduction322

D.Examples of Repeater Design326

1.Repeater for a Commutator Coder326

2.Repeater for an Optical Coder331

ChapterⅧ　　OPTICAL CODERS FOR DFTI339

A.Reading Systems339

1.Index width and Alignment342

2.Viewing Angle344

3.Cross-Talk344

B.Spectroradiometric Comsiderations346

C.Photosensitive Elements350

1.Photoemissive Devices351

2.Photovoltaic Cells362

3.Photoconductive Films362

4.Circuits for Using Photocells372

D.Light Sources373

1.Gas Discharge Light Sources373

2.Incandescent Sources379

E.Shaft-Ahgle Coder382

1.Mechanical Design382

2.Coder-Reading System386

3.Coder Electronic System390

F.DIGITAL CAMETAS395

1.Camera Configurations395

2.Scanning Digital Camera397

3.Cylindrical-Lens Digital Camera403