Sine wave oscillator

Thread Starter

sibisties

Joined Jun 21, 2006
1
I'm looking for a simple, frequency adjustable, sine wave oscillator. The sine wave needs to be as pure as possible. Frequency range from 100 to 120 MHz. The Dallas DS1085 would be perfect, but it outputs a square wave...

Help please! Thanks
 

Papabravo

Joined Feb 24, 2006
13,972
Originally posted by sibisties@Jun 21 2006, 06:42 PM
I'm looking for a simple, frequency adjustable, sine wave oscillator. The sine wave needs to be as pure as possible. Frequency range from 100 to 120 MHz. The Dallas DS1085 would be perfect, but it outputs a square wave...

Help please! Thanks
[post=17837]Quoted post[/post]​
What you are asking for is an RF signal generator at a frequency range where careful layout, component selection, complex measurement techniques and instruments, and trial and error are the order of the day.

Try Googling the various oscillator types Hartley, Colpitts, and overtone to see if that leads in a fruitful direction.
 

beenthere

Joined Apr 20, 2004
15,819
Hi,

You might find that a Colpitts oscillator will do the trick, at least as to easily adjustable. The ARRL site should have oscillator designs for anything from 1 Hz to GHz regions.

Measuring the purity of the sine wave at those freq's is going to be interestinjg.
 
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