[sdiy] cheap sine wave osc

[Derek Holzer]

Hi Magnus,

a filter with feedback was definitely on the list of options, and I have 
some TL074s laying around to check it with. I'll hit the datasheet and 
have a look. Thanks for the suggestion!

d.

Magnus Danielson wrote:
> 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
> 

-- 
derek holzer ::: http://www.umatic.nl ::: http://blog.myspace.com/macumbista
---Oblique Strategy # 169:
"Use filters"