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< Analog Electronic ~ Three-phase sine wave generator

eric
Posted: Fri Sep 01, 2006 6:14 pm Post subject: Three-phase sine wave generator
Site Admin Joined: 01 Jan 1970 Posts: 311
A Burr-Brown application
The diagram shows how a three-phase sine wave oscillator can be
built with a single Type UAF42 state-variable filter and some resistors
and diodes. Three output nodes are available: high-pass out,
band-pass out, and low-pass out. The signal at the band-pass and
low-pass out nodes is 90 and 180 out of phase, respectively, with
that at the high-pass node. An on-chip auxiliary op amp is available
for use as a buffer or amplifier stage.
The frequency of oscillation is set with resistors RF1 and RF2
according to
fOSC=1/


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