[sdiy] integrator / capacitor leakage

[James Patchell]

Come join the dark side.... :-)

         I have a feeling you may not be able to avoid the programming 
part.  You can also do this with FPGA's.  Big trouble is, there are no 
inexpensive eval boards with Audio Converters.  You would still need to use 
either Verilog or VHDL to program them.

         There are chips...generally used for radio work.  For audio, I 
would think you would want to use 24 bits (min), the chips used for RF 
generally tend to be about 12 bits (they vary).

         In the FPGA realm,  you could use a phase accumulator and a CORDIC 
(the CORDIC takes in phase angle, and can spit out sin and cos outputs, 
among other things).

         When I can get some free time, I want to build an FM synthesizer 
that has 1024 sine generators using a CORDIC.. (gonna take up a lot of 
silicon)....

At 10:21 AM 12/6/2005 +0100, jhaible at debitel.net wrote:
> > If you're really just needing sine waves - which are easy to make
> > digitally without aliasing - it's hard to come up with a solid reason that
> > analog is necessarily better in that application.
> >
>
>I'm already convinced. 8-)
>
>Are there chips out there which do this? I don't want to start
>programming, so the obvious solution, DSP with on-chip ADCs and
>DACs, won't help me much.
>
>JH.
>
>-------------------------------------------------
>debitel.net Webmail

         -Jim
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