1 KHz Audio Oscillator schematic

  
This circuit consists of a CMOS square wave oscillator on a frequency of approximately 1 kHz. The RC filter, which has a roll-off frequency of 500 Hz, filters the harmonics, providing a sine-wave output.
1 KHz Audio Oscillator schematic - schematic

The oscillator has many uses ? sidetone circuits in transmitters and signal injectors for audio tests are just two.



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