Friday, 3 February 2012

LFO Auxiliary Sine and Sync

Just for the record, here are scope shots of the Aux LFO sine output.  The first shot shows the basic diode-shaped sine wave:
Clearly not a perfect sine, but the distortion is down to around 1% THD.  Not hi-fi grade but certainly useful for modulation purposes.

The second shot shows the same sine wave but sync'ed to the positive edge of an external square wave:
The sync circuit is designed to reset the auxiliary oscillator to the 0 degree starting point.  With the switch in the NEG position the oscillator is reset by the falling edge of the square wave.

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