SV: Re: SV: [sdiy] QVCO schemo up

[Ian Fritz]

At 01:26 PM 11/12/05, harrybissell wrote:

>as you guessed, I've been there.  I made my own OTA models and
>packaged them as 9 terminal op-amps.  So I can remember the
>inputs and outputs by location, but forget the rest of the pinouts.
>
>My first step in an OTA sim is to jack in an external sine wave into
>an input and verify the connections to Gm bias etc.
>
>My second step was to add the integrators and cross couple them.
>
>My third step was to wonder why the resulting waveforms were NOT
>quadrature sines, but some odd-chaotic thing.

Aha!!!  Way cool.

I'll have to try this with my resonant 4-pole.  Never thought of it before.

   Ian