offset adjusting

[Martin Czech]

:::well folks, the free trade zone database finally identified some nice weird 
:::chips for me from my weird chips box.. the LMC669 is apparently 
:::discontinued, but there must be something out there like it.. it's an auto 
:::op amp offset calibrator.. attach to the summing node and the + in and it 
:::claims to auto calibrate the offset to [typ] 5uv! independent of supply 
:::vtg,time,temp, and req's no user offset adj. this could be the solution to 
:::many a finicky vco prob! unfortunately Ive only got 1...
:::cheers,
:::dan

chopper? Could give some nasty frequency artefacts...

m.c.