Audio Phase Shift Oscillators

Here is a phase-shift audio oscillator with excellent distortion characteristics thanks to “softened” diode limiting provided by the 1N914 and resistor divider and degenerated gain provided by the 68 ohm emitter resistor. For minimum distortion, increase the 68 ohm resistor to a point just below where oscillation stops. A simple buffer may be added for driving lower impedance loads. The output amplitude will be about 5 volts p-p but one of the 1N914’s 10k divider resistors may be changed for a different output amplitude.

The circuit will work well with a power supply voltage other than 9 volts but the 68 ohm resistor may need adjustment

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This entry was posted on Friday, January 25th, 2008 at 4:54 am and is filed under Audio power amplfier, Audio preamp circuits, Electronics And Projects, Frequency, Schematics. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.