Timer 555

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Main Question or Discussion Point

I am thinking of using the output frequency of a 555 relaxation oscillator for measurement purposes. The frequency would be related to my measurement signal.

How stable are these oscillators at low frequencies?
Any personal experiences would help.

How stable can you get then with good capacitors and low temp constant resistances?
Did anyone measure a sigma tau diagram on these things?

My experiment would have some build up time and when the 555 triggers some decay time. (actually not due to capacitors) The smaller the amplitude the better, but I am worried about the jitter due to voltage noise on the wire. Does anyone have design ideas?
 

Answers and Replies

  • #2
phinds
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How stable are these oscillators at low frequencies?
Have you checked out the spec sheet?
 

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