- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
I need to design a closed-loop control system but i have this problem:
Every 10 samples of ADC delta sigma this noise contaminates the signal.
Does anyone know how to solve this problem?
Samlple Rate: 1 kHz.
Clock Source: External
Thanks for Listening
Solved! Go to Solution.
- Tags:
- adc delsig
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
ls.manoel,
You didn't describe electrical part of the system. Is this a temperature control using thermistor? If you are using PWM control (e.g. thermo-electric cooler control or a heater) I believe that spikes come from the sensor (thermistor) input electrical interference with PWM pulses. If so, try to separate/shield thermistor wires and PWM output wires. Additional capacitor on the input should help also.
If nothing works, add simple 3-point median filter to cut out spikes from the sampled signal:
Re: Feature request: add Median Filter component to Digital Filter component
/odissey1
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
ls.manoel,
You didn't describe electrical part of the system. Is this a temperature control using thermistor? If you are using PWM control (e.g. thermo-electric cooler control or a heater) I believe that spikes come from the sensor (thermistor) input electrical interference with PWM pulses. If so, try to separate/shield thermistor wires and PWM output wires. Additional capacitor on the input should help also.
If nothing works, add simple 3-point median filter to cut out spikes from the sampled signal:
Re: Feature request: add Median Filter component to Digital Filter component
/odissey1