Hello -
I'm using Qucs to model up some guitar effects and I've created a crude but serviceable model of a guitar pickup to use as input. I've got a voltage source producing a 500mV sinewave at 440Hz in series with an inductor and a resistor and that trio is in parallel with a small cap (see image).
What I don't understand is why the signal I'm pulling off has a harmonic added to the voltage source's signal (I can change its frequency by changing the value of the inductor). If the source is really a sinewave, I can understand the L/R/C network causing a certain attenuation, but I wouldn't expect such a circuit to induce a resonance like this except at the transition to a discontinuous signal like a pulse or sawtooth wave. Have I done something wrong here?
Thanks!
I'm using Qucs to model up some guitar effects and I've created a crude but serviceable model of a guitar pickup to use as input. I've got a voltage source producing a 500mV sinewave at 440Hz in series with an inductor and a resistor and that trio is in parallel with a small cap (see image).
What I don't understand is why the signal I'm pulling off has a harmonic added to the voltage source's signal (I can change its frequency by changing the value of the inductor). If the source is really a sinewave, I can understand the L/R/C network causing a certain attenuation, but I wouldn't expect such a circuit to induce a resonance like this except at the transition to a discontinuous signal like a pulse or sawtooth wave. Have I done something wrong here?
Thanks!
Attachments
-
86.1 KB Views: 52