Understanding Frequency in Pulse Tone Oscillators

AI Thread Summary
Pulse tone oscillators consist of a resistor and two capacitors, where the resistance and capacitance values directly affect the oscillator's frequency. The time constant, determined by the R/C values, influences the duration of the on/off pulse, which in turn dictates the overall frequency of the oscillator. Understanding the relationship between resistance, capacitance, and frequency is essential for analyzing waveform characteristics such as amplitude and wavelength. Practical experimentation, including building the circuit and plotting graphs, is recommended to visualize how frequency varies with changes in resistance and capacitance. This hands-on approach will enhance comprehension of the underlying principles of pulse tone oscillators.
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can someone please give me some information about electronic oscillator circuits, in particular pulse tone oscillators (thats what it says it is) consisting of a resistor and two capacitors. how does the resistance/capac effect frequency? what does the time constant have to do with it? does the time constant have an effect on the freq? is there an equation to find the freq in a circuit like this? i need help...

heres a pic of the circuit
http://i.imgur.com/XodmHpA.jpg
 
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hi there
welcome to PF

you cut out all the rest of the text ... there's probably some useful info in there for you
on the description of the osc.
show us more of the accompanying text or a www link to the article please :smile:

The time constant set by the R/C values determines the ratio of the on/off pulse length and that determines the overall freq of the oscillator

It looks kinda similar to a relaxation oscillator but with variations
Dave
 
hi thanks for the reply, i got this out of a manual and here is the text:
http://i.imgur.com/XvwyyEw.png

i am a complete beginner in this field and so could you explain what you mean by the on/off pulse length

thanks
 
in general the main focus is to understand the effect of changing resistance and capacitance on the freq, amplitude and wavelength of a waveform... i was just wondering about the background information and how this all works and what extra aspects are here
 
You are investigating this by building it and running some tests? Plot some graphs so you can show how f varies with R, and how f varies with C. Sketch all waveforms and monitor them to see how some change with change of componets.

This does sound like a homework or prac exercise.
 

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