MOTM

Can someone draw a graph of this (FM w/ through-zero) and FM w/o?  I don't
quite understand what's special.  I believe I understand FM, but maybe I
don't when it comes to near-0 voltages...

--PBr

> -----Original Message-----
> From:	Dave Bradley [SMTP:daveb@...]
> Sent:	Friday, November 17, 2000 7:54 AM
> To:	motm@egroups.com
> Subject:	[motm] Re: Through-zero FM?
> 
> --- In motm@egroups.com, "Tkacs, Ken" <ken.tkacs@j...> wrote:
> > To do "true" Chowning Frequency Modulation Synthesis (ala Yamaha DX-
> > 7) you need a VCO where the FM can send the oscillator 'through 
> > zero.' In an analog VCO this is tricky.
>  
> This is my understanding also. I believe sending the vco 'through 
> zero' is another way of saying that the modulator can cause the 
> waveform to reverse on itself, sort of like instantly flipping the 
> phase.
> 
> Someone please correct me also if I'm wrong. Doug, you're on this 
> list - do we have it right?
>