analog voltage to duty cycle for fuel injector

[Dave Morrill]

Hello all,
	It's been a long time since I've posted to this group.  I've been busy
but I'm back working on EFI type stuff.

I have a ZRT800 snowmobile with a custom built turbocharger setup.  It's
working pretty well, but fuel mgmnt is a big issue.

I'm planning to piggyback a fuel injection system to compensate for the
added fuel required by boost.



Has anyone designed an analog voltage to duty cycle circuit?  I can
easily convert boost to a voltage which I want to use to vary the duty
cycle of the injectors.

thanks,
	Dave.