The twin-T oscillator simulated here produces damped oscillations when excited by short sqare pulses. The pulses came ftom the function generator. The damping factor can be changed replacing R5 by a resistor in the 10k to 47k range. Also, you can replace this resistor by a 100 k ohm potentiometer.The frequency also depends on the capacitors in the twin-T. The circuit can be powered from sources between 9 and 15 V. Observe the adjustments of duty-cycle, frequency, amplitude and shape of the signal produced by the function generator and also the asdjustments for the oscilloscope.
To download the simulation files and Netlist - click here (msb0011e.zip)