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Page 52 AI 400 SERIES PROBES
C
YBER
A
MP
380, COPYRIGHT MARCH 2002, AXON INSTRUMENTS, INC.
AI 401, x10, Low-Noise Differential Amplifier
This amplifier provides low noise, high input impedance, a good common-mode rejection ratio, and
low drift. The rms noise of 0.7 µV in the DC-10 kHz bandwidth is equivalent to the thermal noise of
a 5 kΩ resistor. The AI 401 probe is applicable to a broad range of physiological and other
measurement tasks, such as:
EMG, ECG, EEG, EOG
Extracellular microelectrodes
Surface potentials
Electronic circuit testing
pH and ion-concentration measurement
The gain of x10 is large enough to eliminate the noise contribution of succeeding stages in the
amplifier pathway, yet sufficiently small to enable a differential input voltage of ±1 V to be measured
without saturation. Field-effect transistor (FET) inputs assure low input leakage currents and high
input impedance so that the test circuit or electrodes are not loaded.
AI 402, x50, Ultra-Low-Noise Differential Amplifier
This amplifier probe provides the ultimate in low-noise amplification. Using discrete transistor
circuitry this probe achieves noise of less than 0.18 µV
rms
(1.1 µV
p-p
) in the DC-10 kHz bandwidth,
equivalent to the thermal noise of a 250 Ω resistor. Also, the input impedance is high, the bias current
is low and the common-mode rejection ratio is excellent. The temperature dependent drift, however,
is inferior to that of our other amplifier probes.
The AI 402 probe is applicable to a broad range of physiological and other measurement tasks, such
as:
EMG, ECG, EEG, EOG
Extracellular microelectrodes
Surface potentials
Electronic circuit testing
pH and ion-concentration measurement
Nerve cuff recording
The gain of x50 is large enough to eliminate the noise contribution of succeeding stages in the
amplifier pathway, and enables a differential input voltage of ±200 mV to be measured without
saturation. Field-effect transistor (FET) inputs assure low input leakage currents and high input
impedance so that the test circuit or electrodes are not loaded.
AI 403 Picoamp Current-to-Voltage Converter
This current-to-voltage converter is suitable for any application that requires a picoammeter with both
low noise and wide bandwidth. The wide bandwidth of the AI 403 is unique in picoammetry. In
other picoammeters, the stray capacitance around the internal measurement resistor (10 GΩ) typically
limits the bandwidth to a few tens of Hertz. In the AI 403, special frequency compensation circuitry
compensates the inherently poor frequency response of the feedback resistor. The compensation is
achieved without adding noise, producing a bandwidth of 20 kHz. Sophisticated, discrete, field-effect
transistor input circuitry is used to obtain the ultimate in low-noise current measurement.
- CyberAmp 380 1
- Declaration of Conformity 3
- IMPORTANT INFORMATION 5
- RENSEIGNMENTS IMPORTANTS 6
- WICHTIGE INFORMATIONEN 7
- INFORMACION IMPORTANTE 8
- Explanation of symbols 9
- Explication des symboles 9
- Explicación de símbolos 9
- SÉCURITÉ 10
- SICHERHEITS 10
- HINWEISE 10
- SEGURIDAD 10
- COPYRIGHT 11
- VERIFICATION 11
- TABLE OF CONTENTS 13
- INTRODUCTION 19
- Page 2 INTRODUCTION 20
- INTRODUCTION Page 3 21
- FUNCTIONAL DESCRIPTION 23
- General Features 26
- FUNCTIONAL CHECKOUT 29
- TYPICAL CONFIGURATIONS 33
- Supply Voltage 37
- Changing the Fuse 37
- Grounding and Hum 38
- Power-Supply Glitches 39
- Input Coupling 39
- Expansion 40
- Low-Pass Filter 41
- Amplitude Characteristics 42
- Sampling Rate 43
- 10-90% Rise Time 43
- AC Coupling and Autozeroing 44
- 3 dB frequency of 44
- Time Constant 46
- 100 1.6 46
- Saturation 47
- Notch Filter 48
- Overload Detection 49
- Audio Monitor 50
- External Input 51
- Electrode Test 52
- Strain Gauges 55
- Active Probes 56
- Common-Mode Rejection Ratio 57
- Troubleshooting 59
- TRANSDUCERS 61
- Page 44 TRANSDUCERS 62
- TRANSDUCERS Page 45 63
- EMG, EEG, ECG Recording 64
- Nerve Cuffs 65
- Metal Microelectrodes 65
- Page 48 TRANSDUCERS 66
- Pressure 67
- Acceleration 67
- Self Heating 68
- Isolation 68
- Insulation Techniques 68
- AI 400 SERIES SmartProbes 69
- Transducer Adapter 71
- Input Connector Color Scheme 72
- Recommended Input Coupling 73
- Connector 74
- Example Circuits 75
- Basic Thermistor Circuit 76
- Amplifier Probes 78
- Current Probes 79
- Photodiode Amplifier 79
- Linear Potentiometers 80
- Rotary Potentiometers 80
- Panel Switch 81
- Foot Switch 81
- CMD300 CONTROL SOFTWARE 83
- Command-Line Mode 85
- Interactive Mode 85
- Command-File Mode 86
- Command Reference 87
- CMD300 OVERLOAD 91
- CMD300 REPEAT OVERLOAD 94
- QUICK300 CONTROL SOFTWARE 97
- Command Line Options 100
- CyberControl SOFTWARE 101
- Starting CyberControl 102
- Overload Handling 105
- Keyboard Commands 105
- Communications Settings 107
- PC Menus 108
- Macintosh Menus 109
- PROGRAMMER'S GUIDE 112
- Libraries and Example Code 114
- > end of response 116
- AT3F5 24000 118
- 2 4 6 8 10 ... 28000 30000 118
- AT8R06000 121
- D5=-1234500 124
- Implementation Notes 125
- Support Routine Details 125
- Example Programs 129
- SPECIFICATIONS 135
- Page 118 SPECIFICATIONS 136
- Offset range: ±10 V 137
- Page 120 SPECIFICATIONS 138
- SPECIFICATIONS Page 121 139
- Page 122 SPECIFICATIONS 140
- REFERENCES 141
- ADJUSTMENT PROCEDURES 143
- Other Adjustments 144
- CIRCUIT DIAGRAMS Page 127 145
- SERIAL COMMUNICATIONS CABLES 147
- LIST OF FIGURES AND TABLES 149
- WARRANTY 151
- WARNING 153
- INDEX Page 137 155
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