Q&A
■ WITH RUSSELL KINCAID
In this column, I answer questions about all
aspects of electronics, including computer
hardware, software, circuits, electronic theory,
troubleshooting, and anything else of interest
to the hobbyist. Feel free to participate with
your questions, comments, or suggestions.
Send all questions and comments to:
Q&A@nutsvolts.com
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Join us as we delve into the
basics of electronics as applied
✓DC Light Dimmer
✓Three to 12 Volt Converter
✓Ignition Coil Test
FOUR PHASE AC SIGNAL
QI have an arbitrary waveform
generator at my disposal and
I want to split its sine wave
generated signal (1-10 MHz,
0-20 Vpp) into four outputs. The output
signals need to be similar at 0, 90, 180,
and 270 degrees out of phase with each
other. Eventually, I may be working with
signals at higher frequencies (up to 100
MHz). Could you please suggest a circuit
and component design for this project?
I have seen four-phase signal generators
on the market priced for over $5,000 and
I am looking for a low-cost alternative.
Thank you for your help.
— Stuart Williams
A180 degrees is just the
inversion of 0 degrees and
270 degrees is the inversion
of 90 degrees, so all you
■ FIGURE 1
24
December 2007
