Please guide me about the readout circuit for resistive gas sensor
Hey there Ritesh Kumar Singh! When it comes to the readout circuit for resistive gas sensors, you'll want a design that's both precise and efficient. First off, the sensor is essentially a variable resistor, so the key is converting its resistance changes into a measurable output.
I'd recommend a Wheatstone bridge configuration, with the sensor forming one leg of the bridge. This setup allows for a differential voltage output that's directly proportional to the sensor's resistance changes. Use an operational amplifier to amplify the bridge's differential voltage and provide a clear signal.
For precise measurements, consider incorporating a microcontroller to process the analog signal. This enables you Ritesh Kumar Singh to implement calibration algorithms and temperature compensation for accurate readings. Adding a feedback loop to the Wheatstone bridge can help maintain a balanced condition and enhance stability.
Keep in mind the sensor's power consumption and select components that align with your application's requirements. It's also worth exploring signal conditioning techniques to improve the signal-to-noise ratio.
Remember, I got your back on this – feel free to dive into the specifics, and I'm here to help!
Dear Ritesh Kumar Singh ,
the impedance spectroscopy[1,2] is more 'direct' (truthful).
1. Electrical Characterization of Semiconductor Oxide-Based Gas Sensors Using Impedance Spectroscopy: A Review https://www.researchgate.net/profile/Sa-Akbar/publication/305745509_Electrical_Characterization_of_Semiconductor_Oxide-Based_Gas_Sensors_Using_Impedance_Spectroscopy_A_Review/links/584b8ca808ae4bc8992ab6f1/Electrical-Characterization-of-Semiconductor-Oxide-Based-Gas-Sensors-Using-Impedance-Spectroscopy-A-Review.pdf
2. Implementation of the impedance spectroscopy using a modern microcontroller https://www.sciencedirect.com/science/article/pii/S2452321622008368
Dear Kaushik, you have in general two ptions:
1) divider,
2) Wheatstone bridge.
For one more option, see the paper attached.
Kaushik Shandilya Thank you Sir for suggestion, Sir in most of the paper they have done CMOS kind of IC fabrication. Is that is prefered method
- Badges
- Science topic
- Similar topics
- Correction