You caught my interest with this chip. It seems to be an actual hi-res
sampled sine wave that can be given frequency and phase digitally. However,
if I read it right, it has a minimum clocking frequency of 5 MEGAhertz,
below which it powers itself down.
Also, while this chip can output sine and square waveforms, a ramp (even
better, bi-directional ramps) are needed for a Shepard "barberpole" effect.
Could be cool though. I'll keep browsing the docs. Maybe a cool additive
synth oscillator could be made with this chip, since the app notes talk
about controlling the amplitude digitally as well.
-----Original Message-----
From:
revtor@... [mailto:
revtor@...]
Sent:Sunday, 03 December, 2000 9:40 PM
To:
motm@egroups.comSubject:[motm] cool chip ?
all,
on the analog devices website..
found chip # AD9851. outputs a digitized analog sinewave. the cool thing
is though that "The device provides 5-bits of digitally-controlled phase
modulation which enables phase shifting of its output in increments of 180°,
90°, 45°, 22.5°, 11.25°, and any combination thereof. " Phase control..
now if the thing can generate LFO range waves..... useful I woudl think as
a basis for something right? Shepard tones and im sure alot more.
output tuning resolution of 40 milli hertz pretty good, no?
later,
~Steve