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opamp attenuate signal theory question

hello,

i am trying to make an oscillator that I can plug into a guitar amp (or keyboard or bass amp). i made an oscillator, but the amplitude of the signal is way too big, 9 volts, i was wondering how i could bring this signal down to the millivolts level (i think that's typical for keyboard amps)..... could i just stick a resistor at the end of my output.... for some reason I feel weird about doing that.... like thinking that maybe I need a buffer in there, that if I do just put a resistor at the output of my oscillator that that when i do hook the circuit up to a load (the guitar amp) that it would change the signal.... like it wouldn't be consistent but instead dependent on the load..... could anybody help me out with this?

thanks joshua

Reply to
panfilero
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Have Fun! Rich

Reply to
Rich Grise

You need a resistor like the one you mention AND another resistor to ground. This makes a 'voltage divider' that attenuates the signal.

To attenuate from volts to millivolts you need a ratio of 1000:1.

I suggest you connect a 47k resistor to the oscillator output. Connect the end of that to a 47 ohm resistor and connect the other end of the 47 ohm resistor to ground. Take the signal from the junction of the two resistors.

Graham

To

Reply to
Eeyore

panfilero snipped-for-privacy@gmail.com posted to sci.electronics.design:

A resistor based divider is appropriate.

Reply to
JosephKK

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