[sdiy] VCO......for BBD-based PM) Very high freq VCO core!

[karl dalen]

Old thread but anyway, if you want a super
high freq triangle core try the Linear LT1228
OTA. On my 20Mhz scope it "booped" away
to become just a nice and thick green/wite
"untriggeable" CRT ray! :-)

The LT1228 does easily DC-50Mhz, but that
would put the expo converter under supreme
pressure i think! :-) I would like to se a 
expo that can sweep that range in one go
with accuracy! :-8

Besides does the CS80 charge-balance VCO
also loose in amplitude at higher freq
just like the Chroma does?

Reg
KD   

--- "JH." <jhaible at debitel.net> skrev: > > Maybe this
would be a good place for the
> charge-balancing type of V-F 
> > converter?  Normally these are of limited use
> because the output is a 
> > narrow pulse, but could be OK for a clock.
> 
> Like the CS-80 and Rhodes Chroma VCOs? They even put
> out a nearly
> saw shape. OTOH, pulses are just fine for BBDs (with
> a flipflop, that
> unfortunately will bring in another factor 2 for
> timing accuracy.)
> 
> JH. 

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