[sdiy] fast opamp with low offset

[cheater cheater]

David,
have you got a schematic of the VCO as it is right now? I am quite
interested how it looks currently after numerous threads on SDIY :-)
It must be one of our pet projects here!

Cheers
D.

On Sun, Apr 4, 2010 at 17:32, Ian Fritz <ijfritz at comcast.net> wrote:
> At 07:28 PM 4/3/2010, David G. Dixon wrote:
>>
>> > by canceling the charge injection via a replica switch.
>>
>> H&H discuss using complementary switches in an integrator.  I don't have
>> it
>> at hand, as I'm not at home, but it may be worth looking into.  I suppose
>> this is essentially your first suggestion.
>
> I had to do this with my Saw TZ VCO to make the positive and negative ramps
> both reset to zero and have the same amplitude.  It wasn't hard to do --
> just a transistor switch and an RC differentiator -- but in the end I
> actually had to make it adjustable toget it good enough.
>
> Ian
>
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