Audio IC Circuits Manual (eBook)

Front Cover 1
Audio IC Circuits Manual 4
Copyright Page 5
Table of Contents 6
Preface 8
Chapter 1. Audio processing circuits 10
Op-amp basics 10
Closed-loop amplifiers 12
Practical op-amps 14
Linear amplifier circuits 15
Voltage follower circuits 17
An audio mixer 19
Active filters 20
Active filter circuits 21
Variable active filters 24
Tone-control networks 25
Active tone controls 28
Graphic equalizers 29
Record Industry Association of America equalizers 32
RIAA phono pre-amp 33
Non-linear amplifiers 34
Constant-volume amplifier 36
Operational transconductance amplifier devices 37
Practical OTAs 38
Basic OTA circuits 39
CA3080 variable-gain circuits 41
LM 13600 variable-gain circuits 43
Amplitude modulation 43
Ring modulators 45
An automatic gain control amplifier 47
The LM13700 48
The MC3340P 48
The NE570/571 IC 50
Circuit description 51
A stereo VCA 51
Compander theory 51
An expander circuit 52
A compressor circuit 54
A total harmonic distortion trimmer 54
Chapter 2. Audio pre-amplifier circuits 55
LM381/LM382/LM387 ICs 56
LM381/LM381A basics 59
Differential operation 60
Single-ended operation 63
LM382 circuits 65
LM387 circuits 67
LM381/382/387 usage hints 70
The TDA3410 IC 71
Chapter 3. Audio power amplifier circuits 74
Low-power op-amp circuits 74
Boosted-output op-amp circuits 76
IC power amplifier basics 77
Practical ICs 79
LM386 basics 79
LM386 applications 81
LM389 circuits 84
LM831 circuits 86
LM390 circuits 88
LM388 circuits 91
TDA2822 circuits 94
TBA820M circuits 95
LM380/LM384 circuits 96
Chapter 4. High-power audio amplifiers 100
LM377/378/379 circuits 100
The TBA810S and P 107
LM383 (TDA2003) circuits 107
LM2002 (TDA2002) circuits 109
The LM2879 circuit 111
The TDA2004 circuit 113
The TDA2006 circuit 114
The TDA2030 circuit 116
The TDA2005M circuit 117
The TDA1520 circuit 117
The LM1875 circuit 119
Chapter 5. LED bar-graph displays 121
LED bar-graph basics 121
U237 bar-graph driver ICs 123
Practical U237 circuits 125
Over-range alarms, etc. 129
LM3914 dot/bar-graph driver ICs 131
Practical LM3914 circuits 134
Chapter 6. CCD audio delay-line circuits 141
Delay-line basics 141
How much delay? 143
Psycho-acoustics 144
Delay-line applications 145
Practical ICs 152
Practical circuits 155
Chapter 7. Power supply circuits 163
Power supply circuits 163
Transformer-rectifier selection 164
The filter capacitor 166
Voltage regulator circuits 167
Zener-based circuits 167
Fixed 3-terminal regulator circuits 169
Voltage variation 170
Current boosting 172
Index 175