[sdiy] vfc110's and other ic's

[Scott Bernardi]

If it goes all the way up to 100kHz you could always feed it into a flipflop
(divide by two) and get a 50% duty cycle.

trip at bluesummers.net wrote:

> I dug though some spare parts today, found some things i didn't know I had...
> first was a set of 3 vfc110 voltage-to-frequency converters. they're specified
> to have 0.005% linearity error at a sweep of 0-100 khz. I was thinking that
> these would make great vco's, anyone tried using these before? the problem is
> that they are open collector output from a oneshot, so 50% duty cycle will
> be next to impossible without some kind of hack... there is an enable pin,
> so maybe sync could be done easily, any ideas?
>
> next off were 4 each of two types of ic, one marked 'bip2610-1' and
> 'bip2611-1'. the manufacturer logo appears to be burr-brown, and they're
> extreamly old (mixed in with original 74xx ttl chips.) I can't find
> anything on these parts, does anyone know what they are?

--
Scott Bernardi
sbernardi at attbi.com