on oscillators

[Martin Czech]

:::As JH pointed out, my experimental triangle VCA core based on a differential
:::integrator works with an npn converter (he accidentally typed pnp, though).
:::It's just a two0transistor diff amp with the usual diff op0amp readout
:::replaced by a diff integrator and with hysteretic feedback. Again, a sketch
:::is in EN #111.
:::
:::  Ian

Thanx,

Oh, I mixed it up, I thought #38 for some reason, and obviously it wasn't
there, too early...

Anyway, I just wrote down some results of the weekend, and I found it
interesting that triangle and saw integrator cores can basically do the same
things (also deep FM) which was not so clear to me,
so now it is not so clear for me who is the winner...


It looks like (proposal: some kind of stupid table, 0 order approach ;->):


              Tri    Saw
           -----------------     
linearity      1     2

spikes in
saw            0     2

spikes in
tri            2     0

# of compo     0     2
nents

deep FM        2     1

set to
value sync     1     2

linear
detune         1     2

component      1     2
tol. influ.

comparator     1     2
requi.
and loop
speed

triangle like
sync           2     1

saw like sync  1     2

tri symmetry   1     2

npn expo       0     2
converter

useability     1     2
as phase
pointer
------------------------------------
               14    22
               
0: not good, impossible, 
1: possible, complicated,average, 
2: good


This is based on a 3080 app. note style tri osc.,

when I get home I'll look into #111, easy to memorize....
if this works good enough the triangle osc would 
get a much better rating...


m.c.