Noise reduction IC? - Electronic Circuits Projects Diagrams Free

wilbee · 1st March 2004, 11:51 AM

>dear all

I had put together a simple detection system using an optical incremental encoder system, the output is a voltage signal which corresponds to the displacement.

however, after some studying at this output signal I found the noise to be higher than I wanted. It is currently at 50mV and I wanted it to get down to 5mV. As I need to sample this voltage and process it in a PC and the DAQ card has a resolution of 8mV.
The voltage singal (not including the noise) is not going to be changing at a rate higher than 20kHz.

Are there any processing chip I can readily buy, which will attenuate this noise level?

Many thanks first for any help :lol:
wil

**Nigel Goodwin** · 1st March 2004, 12:18 PM

You need to give a lot more details - filtering could reduce the noise, but only if the noise is in a different part of the spectrum to the signal.

Have you tried to reduce the noise at the source?, where is the noise actually coming from?.

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1st March 2004, 11:51 AM	(permalink)
wilbee	Noise reduction IC? >dear all I had put together a simple detection system using an optical incremental encoder system, the output is a voltage signal which corresponds to the displacement. however, after some studying at this output signal I found the noise to be higher than I wanted. It is currently at 50mV and I wanted it to get down to 5mV. As I need to sample this voltage and process it in a PC and the DAQ card has a resolution of 8mV. The voltage singal (not including the noise) is not going to be changing at a rate higher than 20kHz. Are there any processing chip I can readily buy, which will attenuate this noise level? Many thanks first for any help :lol: wil

1st March 2004, 12:18 PM	(permalink)
Nigel Goodwin	You need to give a lot more details - filtering could reduce the noise, but only if the noise is in a different part of the spectrum to the signal. Have you tried to reduce the noise at the source?, where is the noise actually coming from?.