High-Resolution IF-to-Baseband SigmaDelta ADC for Car Radios addresses the theory, system level design and circuit implementation of a high-resolution continuous-time IF-to-baseband quadrature SigmaDelta ADC. The target application of this ADC is in AM/FM/IBOC car radios. The ADC achieves a dynamic range of 118dB, which eliminates the need for an IF VGA or AM channel filter in car radios. The author is very well known within the Analog Circuits community.
Author(s): Paulo G.R. Silva, Johan H. Huijsing
Edition: 1
Year: 2008
Language: English
Pages: 232
Table of Contents......Page 7
Preface......Page 10
1.1 Motivation......Page 12
1.2 Car Radio History......Page 16
References......Page 20
2. DSP Based Radio Receiver Architectures......Page 21
2.1.1 Heterodyne and Homodyne Receivers......Page 22
2.1.2 DSP Based Radio Receiver Architectures......Page 24
2.2.1 Measures of Resolution......Page 27
2.2.2 Measures of Linearity......Page 28
2.3 Desensitization and Blocking......Page 31
2.4 Image Rejection......Page 34
2.5 Analog Radio Broadcasting......Page 39
2.6 Digital Radio Broadcasting......Page 40
2.7 Integrated Solutions for AM/FM Receivers......Page 42
References......Page 47
3. Continuous-Time ΣΔ Modulation......Page 50
3.1 Basic Principles......Page 51
3.1.1 Oversampling......Page 52
3.1.2 Noise Shaping......Page 55
3.1.3 Anti-alias Filtering......Page 57
3.2 High-Order ΣΔ Modulators......Page 59
3.3 Tonal Behaviour......Page 66
3.3.1 DAC Modulation at f[sub(s)]/2......Page 68
3.3.2 2[sup(nd)]-Order Non-linearity......Page 70
3.4.1 Random Jitter......Page 74
3.4.2 Deterministic Jitter......Page 77
References......Page 78
4. ΣΔ ADC Topologies for Radio Receivers......Page 80
4.1 Lowpass ΣΔ ADCs......Page 81
4.1.1 Feedback Compensation......Page 82
4.1.2 Feedforward Compensation......Page 87
4.1.3 Feedforward and Feedback Compensation......Page 90
4.1.4 Feedback Compensation with Local Feedforward Path......Page 93
4.1.5 Resonators and Local Feedback......Page 96
4.2 IF-to-Baseband ΣΔ ADCs......Page 99
4.3 Quadrature IF-to-Baseband ΣΔ ADCs......Page 102
4.4 Bandpass ΣΔ ADCs......Page 111
4.4.1 Continuous-Time Bandpass ΣΔ Modulators......Page 112
4.4.2 Continuous-Time Resonators......Page 115
4.5 Quadrature Bandpass ΣΔ ADCs......Page 118
4.6 Conclusions......Page 120
References......Page 122
5. IF-to-Baseband ΣΔ ADC for AM/FM/IBOC Receivers......Page 125
5.1 IF-to-Baseband Conversion System......Page 126
5.2 IF Mixer......Page 132
5.2.1 Mixer Linearity......Page 133
5.2.2 Mixer Dynamic Performance......Page 134
5.2.3 Isolated Mixer Topology......Page 140
5.2.4 Mixer Driver......Page 144
5.3 First Integrator......Page 146
5.3.1 Design of the 1[sup(st)] OTA To Be Used as a CT Integrator......Page 148
5.3.2 Design of the 1[sup(st)] OTA To Be Used as a SC Integrator......Page 151
5.3.3 1[sup(st)] OTA Transistor Level Design......Page 157
5.4 High-Order Integrators and Resonators......Page 160
5.5 Feedforward Coefficients and Quantizer......Page 165
5.6 SC Feedback DAC......Page 167
5.7 Experimental Results......Page 171
5.7.1 First Prototype......Page 172
5.7.2 Second Prototype......Page 179
References......Page 184
6.1 Benchmarking......Page 186
6.2 Economic Feasibility......Page 188
References......Page 190
A.1 Introduction......Page 194
A.2 Harmonic Distortion in Differential G[sub(m)]-C Integrators......Page 196
A.3 Harmonic Distortion in Differential Feedback Integrators......Page 199
References......Page 202
B.1 Introduction......Page 204
B.2 Noise Voltage PSD Across a Switched Capacitor......Page 206
B.3.1 "Direct Noise" Components......Page 208
B.3.2 "Sampled-and-Held" Components......Page 210
B.3.3 Input-Referred Noise......Page 211
B.4 Input-Referred Thermal Noise Due to the SC Feedback DAC Reference Voltage......Page 212
B.5 Input-Referred Thermal Noise Due to the OpAmp......Page 213
References......Page 215
List of Acronyms......Page 216
List of Symbols......Page 218
E......Page 220
O......Page 221
Z......Page 222
About the Authors......Page 223
