Mixed-signal and DSP Design Techniques (eBook)

Cover 1
Copyright Page 5
Contents 6
Section 1: Introduction 12
Origins of Real-World Signals and Their Units of Measurement 12
Reasons for Processing Real-World Signals 13
Generation of Real-World Signals 14
Methods and Technologies Available for Processing Real-World Signals 15
Analog Versus Digital Signal Processing 15
A Practical Example 16
References 20
Section 2: Sampled Data Systems 24
Introduction 24
Discrete Time Sampling of Analog Signals 25
ADC and DAC Static Transfer Functions and DC Errors 30
AC Errors in Data Converters 37
DAC Dynamic Performance 58
References 65
Section 3: ADCs for DSP Applications 70
Successive-Approximation ADCs 71
Sigma-Delta (S-D) ADCs 78
Flash Converters 90
Subranging (Pipelined) ADCs 92
Bit-Per-Stage (Serial or Ripple) ADCs 96
References 102
Section 4: DACs for DSP Applications 108
DAC Structures 108
Low Distortion DAC Architectures 110
DAC Logic 114
Interpolating DACs 116
Sigma-Delta DACs 118
Direct Digital Synthesis (DDS) 119
References 124
Section 5: Fast Fourier Transforms 128
The Discrete Fourier Transform 128
The Fast Fourier Transform 136
FFT Hardware Implementation and Benchmarks 144
DSP Requirements for Real-Time FFT Applications 145
Spectral Leakage and Windowing 148
References 152
Section 6: Digital Filters 156
Finite Impulse Response (FIR) Filters 160
FIR Filter Implementation in DSP Hardware Using Circular Buffering 165
Designing FIR Filters 168
Infinite Impulse Response (IIR) Filters 179
IIR Filter Design Techniques 182
Multirate Filters 186
Adaptive Filters 190
References 195
Section 7: DSP Hardware 200
Microcontrollers, Microprocessors, and Digital Signal Processors (DSPs) 200
DSP Requirements 202
ADSP-21xx 16-Bit Fixed-Point DSP Core 205
Fixed-Point Versus Floating-Point 221
ADI SHARC Floating-Point DSPs 224
ADSP-2116x Single-Instruction, Multiple-Data (SIMD) Core Architecture 229
TigerSHARC: The ADSP-TS001 Static Superscalar DSP 234
DSP Evaluation and CROSSCORE’ Development Tools 243
References 253
Section 8: Interfacing to DSPs 256
Introduction 256
Parallel Interfacing to DSP Processors: Reading Data from Memory-Mapped Peripheral ADCS 256
Parallel Interfacing to DSP Processors: Writing Data to Memory-Mapped DACS 262
Serial Interfacing to DSP Processors 267
Interfacing I/O Ports, Analog Front Ends, and Codecs to DSPs 274
High Speed Interfacing 277
DSP System Interface 278
References 280
Section 9: DSP Applications 284
High Performance Modems for Plain Old Telephone Service (POTS) 284
Remote Access Server (RAS) Modems 290
ADSL (Asymmetric Digital Subscriber Line) 294
Digital Cellular Telephones 299
GSM Handset Using SoftFone Baseband Processor and Othello Radio 304
Analog Cellular Base Stations 310
Digital Cellular Base Stations 311
Motor Control 315
Codecs and DSPs in Voice-Band and Audio Applications 319
A Sigma-Delta ADC with Programmable Digital Filter 322
Summary 324
References 325
Section 10: Hardware Design Techniques 330
Low Voltage Interfaces 330
Grounding in Mixed-Signal Systems 344
Digital Isolation Techniques 364
Power Supply Noise Reduction and Filtering 368
Dealing with High Speed Logic 387
Index 398