Non-Inverting Gain Amplifier
The figure below shows a non-inverting gain amplifier using an op amp. It represents a high impedance to the sensor (at the VSEN) and produces a positive gain from VSEN to Vout.
Advantages
- High input impedances
- Low bias current (Complementary Metal Oxide Semiconductor (CMOS) op amps)
- Positive gain
- Simplicity
Disadvantages
- Limited input voltage range
- Input stage distortion
- Amplifies common mode noise
Sensor examples
- Thermocouple
- Thermopile
- Piezo-electric film