I've been looking around the net and on past threads on this forum but I cannot find a satisfying answer .
I'm building my own audio synth which will have 3 basic oscillators .
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Question:
How can I make a sin wave generator using an op amp (or transistors ?) which will give me roughly (at least) 30-14000 hz adjustable output with constant amplitude?
I've tried building diffrent kinds of sine wave oscillators that I found on the net that world pretty well but they all seem to do crazy things when i try to adjust the frequency by varying the resistors and the freq ranges are unsatisfying.
I know the title is 'Audio-quality Sine-wave' ,
but a slightly less than ideal sine wave would probably do since this is a prototype project
Some suggestions on earlier threads were to stabilize a Wien-bridge osc. by using a lightbulb or JFET (what??)
The same guy mentioned that his Wien-bridge osc. gives him a sine wave of 10hz-100khz (and that would be pretty dandy )
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The oscillators will be Sine , square and triangle .
I figured that once I get the sine to work then I can make another one and feed it to a schmitt trigger and Get my square wave.
Then I can make another one , feed that into a schmitt and then integrate it and get a triangle (will that work )
There will also be 3 sin wave LFO's (Low frequency oscillators) which will modulate the main oscillators at varying frequencies of 1-50 hz .
I'd really appreaciate some practical help . I'm really exited about this project and i've got most of the stuff figured out but I'm stuck at making a reliable freq-adjustable sin and triangle oscillators.
I'm building my own audio synth which will have 3 basic oscillators .
**
Question:
How can I make a sin wave generator using an op amp (or transistors ?) which will give me roughly (at least) 30-14000 hz adjustable output with constant amplitude?
I've tried building diffrent kinds of sine wave oscillators that I found on the net that world pretty well but they all seem to do crazy things when i try to adjust the frequency by varying the resistors and the freq ranges are unsatisfying.
I know the title is 'Audio-quality Sine-wave' ,
but a slightly less than ideal sine wave would probably do since this is a prototype project
Some suggestions on earlier threads were to stabilize a Wien-bridge osc. by using a lightbulb or JFET (what??)
The same guy mentioned that his Wien-bridge osc. gives him a sine wave of 10hz-100khz (and that would be pretty dandy )
**
The oscillators will be Sine , square and triangle .
I figured that once I get the sine to work then I can make another one and feed it to a schmitt trigger and Get my square wave.
Then I can make another one , feed that into a schmitt and then integrate it and get a triangle (will that work )
There will also be 3 sin wave LFO's (Low frequency oscillators) which will modulate the main oscillators at varying frequencies of 1-50 hz .
I'd really appreaciate some practical help . I'm really exited about this project and i've got most of the stuff figured out but I'm stuck at making a reliable freq-adjustable sin and triangle oscillators.