[sdiy] VCO reset time

[Magnus Danielson]

From: Antti Huovilainen <ajhuovil at cc.hut.fi>
Subject: Re: [sdiy] VCO reset time
Date: Mon, 7 Jun 2004 13:44:23 +0300 (EEST)
Message-ID: <Pine.OSF.4.58.0406071339090.84367 at kosh.hut.fi>

Antti,

> On Sun, 6 Jun 2004, Don Tillman wrote:
> 
> > The topic is PWM from a triangle vs. PWM from a sawtooth.
> 
> Isn't sawtooth based PWM same as triangle PWM that is phase modulated?
> Pulse wave is equal to two sawtooth waves with delay and opposite phases.
> In triangle based PWM you phase modulate both saws in opposite directions,
> while in sawtooth based PWM you only modulate one saw. Thus to me it seems
> that sawtooth PWM is same as PWM but in addition to changing the pulse
> width (as with triPWM) you also change the midpoint of the pulse
> (same as phase modulating the triPWM).

Eh... yes. I think you find that we've already covered that, but was into the
full understanding on what a tri-based PWM had in terms of properties once
we realize that the saw-based has the additional phase-modulation.

Considering the PWM as a pair of sawtooths under some conditions migth or might
not be helpfull. I think we've already got more or less to the bottom of this
without use that path.

Cheers,
Magnus