[sdiy] FM math question

[Mattias Rickardsson]

Multiplication?
Nonlinear?

I have a feeling that everybody puts too much math in this.

Two new views:

1. How would you make a saw-core vco with a sine output (of same phase as saw)?

2. Consider a vco with unknown core. When modulated, would its sine
wave behave differently depending of core type?

/mr


2008/10/16, Ian Fritz <ijfritz at comcast.net>:
> At 11:39 AM 10/16/2008, Mattias Rickardsson wrote:
>>A saw core vco with a saw->tri->sin shaper is a vc sine oscillator.
>>You then modulate this sine with another sine, and get an appropriate
>> result.
>>
>>Am I missing something?
>
> Well, you don't modulate the final sine.  The modulation is of the core
> saw, before the wave multiplication.  Since the multiplication is a
> nonlinear process it would seem to me that the results would be different
> for the two cases.  Maybe not. <shrug>
>
>    Ian
>
>