ok you have entered stop time 10 and simulation is stopping at 2s
in FFT graph view, its freq. is 1.111 Khz , how to calaculate freq. is it same f=1/1.38RC
ok you have entered stop time 10 and simulation is stopping at 2s
in FFT graph view, its freq. is 1.111 Khz , how to calaculate freq. is it same f=1/1.38RC
ok thankyou.
I have one Experimental and interesting question !!
if we remove both Resistor of RC section (R3 and R4) and replace them with Voltage controlled resistor
then by controlling voltage going to variable resistor we can have different oscillating frequency.
so, we will be changing the freqency of oscillation of this oscillator.
(like this one https://www.instructables.com/id/Make-a-Voltage-Controlled-Resistor-and-Use-It/)
so if connect speaker and amplify its signal to be given in variable resistor of RC section, then we will be having frequency modulator. !!
if you want i can post scheamatics
here is the schematic.
i think it deepnds on slew rate on how much this op amp can change voltage freq.
we can use high slew rate op amp , if that is not possible then we can use this FM modulator for lower frequency, not necessarily for audible range. !
Does LTspice has any component like this voltage dependent resistance ? i want to test this ^^
If the dependence is such that the resistance is proportional to voltage then (applying Ohm's Law) the resistor is equivalent to a constant-current source. What sort of dependence did you have in mind?
Yes, a behavioural voltage source could be used.