Signal Conditioning

1
Signal Conditioning
2
Sensor Outputs
3
4-20 mA Analog electrical transmission standard

• Signal is a current loop where 4 mA represents
  zero percent signal and 20 mA represents the one
  hundred percent signal.
• The "live zero" at 4 mA allows the receiving
  instrumentation to distinguish between a zero
  signal and a broken wire or a dead instrument and
  provides good noise immunity.
• The live zero also allows low-power instruments
  to be directly powered from the loop.

4
Simple Control System
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Typical Sensor Resistances
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Typical Bridge Amplifier
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Typical Force-type Transducers
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High-Impedance Sensors
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Photodiode Operating Modes
10
Dynamic Range of Illumination
11
Use of a Guard Conductor
12
40 dB Gain Piezoelectric Amp

13
Professional Microphone Preamp
14
Balanced Transmission Circuit
15
Differential Line Driver
16
NTSC Video Signal
17
NTSC Signal Generation
18
NTSC and PAL Comparison
19
Wide-Bandwidth Video Amplifier