digital-brain/content/zettels/signal_conditioner.md

+++ title = "Signal Conditioner" author = ["Thomas Dehaeze"] draft = false category = "equipment" +++

Tags

[Sensors]({{<relref "sensors.md#" >}}), [Electronics]({{<relref "electronics.md#" >}})

Most sensors needs some signal conditioner electronics before digitize the signal. Few examples are:

• Piezoelectric force sensors
• Geophone
• Photodiode
• Thermocouple

The signal conditioning electronics can have different functions:

• Amplification
• Isolation
• Filtering
• Excitation
• Linearization

Depending on the electrical quantity that is meaningful for the measurement, different types of amplifiers are used:

• 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#" >}}))