A Wien Bridge Oscillator using an operational amplifier is shown in figure 1. The zener diodes is used to stabilization of the sine wave output.
Formula
Wien Bridge Oscillator:
f = 1 / (2 x π x R x C)
Where:
f is the frequency in hertz (Hz)
R is the resistance in ohm (Ω)
C is the capacitance in farads (F)
π is the constant 3.1416
