[sdiy] integrator / capacitor leakage

[Grant Richter]

> At 11:17 AM 12/3/05, JH. wrote:
>
> No. But I want to get 20kHz from 1mA maximum (to keep tracking
> errors reasonable), and I want to get down to 1/30s without switching
> capacitor values. Even that is no problem.
> But I want high waveform precision over the whole frequency range.
> Doing it with two integrators and/or shaping sin + cos, the  
> amplitude error
> should be better than 1%, the phase error should be better than
> 1 deg, and offset should be less than 5mV.
> Now suddenly it *is* demanding.
>

It's called a Digital Signal Processor. An analog solution will be  
very frustrating.