digital-brain/content/zettels/signal_conditioner.md

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title = "Signal Conditioner"
author = ["Thomas Dehaeze"]
draft = false
category = "equipment"
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Tags
: [Sensors]({{<relref "sensors.md#" >}}), [Electronics]({{<relref "electronics.md#" >}})
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Most sensors needs some signal conditioner electronics before digitize the signal.
Few examples are:
- Piezoelectric force sensors
- Geophone
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- Photodiode
- Thermocouple
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The signal conditioning electronics can have different functions:
- Amplification
- Isolation
- Filtering
- Excitation
- Linearization
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Depending on the electrical quantity that is meaningful for the measurement, different types of amplifiers are used:
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- Current to Voltage ([Transimpedance Amplifiers]({{<relref "transimpedance_amplifiers.md#" >}}))
- Charge to Voltage ([Charge Amplifiers]({{<relref "charge_amplifiers.md#" >}}))
- Voltage to Voltage ([Voltage Amplifier]({{<relref "voltage_amplifier.md#" >}}))