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1KHz Phase Shift Sine Wave Oscillator


This is a tried and tested general purpose phase shift oscillator circuit that has been around for many years, and with these particular component values, will produce a sine wave at a frequency of around 1KHz. The circuit is shown below





I found that by adding a simple filter on the output (formed by the 10K resistor and 100n capacitor), the shape of the sine wave produced was greatly improved, albeit at the expense of output level. A veroboard layout is shown below


                                               


As can be seen from the oscilloscope waveform below, the sine wave is pretty clean for a circuit that uses just one transistor





Not much more to say really. It's a nice simple circuit that works well using standard, readily available components