on oscillators

[Martin Czech]

:::From: "Fraser, Colin J" <Colin.Fraser at scottishpower.plc.uk>
:::To: "'Tony Allgood'" <oakley at techrepairs.freeserve.co.uk>, synth diy 
<synth-diy at mailhost.bpa.nl>
:::Subject: RE: on oscillators
:::Date: Tue, 22 Feb 2000 12:20:25 -0000

:::Wasn't Juergen Haible building a triangle core vco with a second timing cap
:::(with either half the charge current or twice the capacitance) to generate a
:::glitch free sawtooth, synced to the start of the tri wave cycle ?
:::Juergen ?

This would basically mean a second slave oscillator with hard sync.


Wouldn't a controlled slew rate limiter eliminate the saw glitches
in a tri - saw converter? I.e. slew rate slow in the charging slope,
and fast in the discharge.

Anyway, the glitches should affect the harmonic structure only slightly,
since the saw is allready pretty bright. I can not see how
frequencys lower then the original tri may appear.

The only problem with a tri -saw converted saw may appear when
post processing this with comparators etc.


m.c.