[sdiy] cheap sine wave osc

[Magnus Danielson]

Hi Derek,

I would consider the classical state-variable filter sine/cosine oscillator.
You would need some form of amplitude limitation mechanism to balance the gain,
but it is essentially a three-op-amp job with two integrators and a summer
setup with feedback. A TL074 can do it all. Maybe not dirt-dirt cheap, but
fairly cheap and still highly available components will work well.

Cheers,
Magnus