ODP: MAX083

[Roman Sowa]

Can I tell about my signal generator too?

I made DC-40MHz bench generator usning AD9850 DDS chip
It produces sine wave with SFDR 30-50 dB depending on frequency
and is a little noisy too. Most difficult to make was 120MHz reference
oscilator and 7th order DAC filter. I upgraded it later with 80dB range
VCA (2 x AD603). 
Using it for audio is an overkill, but it gives me
great pleasure to use it as frequency reference for tuning.
It is also usefull as modulation source.

Roman 

> -----Oryginalna wiadomość-----
> Od:	Tony Allgood [SMTP:oakley at techrepairs.freeserve.co.uk]
> Wysłano:	5 listopada 1998 08:38
> Do:	synth diy
> Temat:	MAX083
> 
> Hi there,
> 
> It was scheduled to be a quiet day in the office so I decided I would have
> a
> go at upgrading my home-made signal generator. This was based on the old
> LFO
> idea of integrator/schmitt trigger with a few waveshapers to get some
> different wave outputs. But slew rate was crap and sinewave distortion was
> not good. So I bought a MAX083. Looks great on paper, both for a VCLFO or
> signal generator.
>