This graphics-intensive program designs and analyzes
active quadrature ("90-degree") networks for use in SSB
transmitters and receivers.
Here are the highlights of this program:
- QuadNet is a 32-bit Windows®
program to design and analyze active quadrature
- Enter the lower and upper audio
frequencies of interest, along with the network
complexity (order) and see the resulting sideband
attenuation. Change any of these items to interactively
refine your design.
- Plug in the values for a published
design to see how it works.
- Fine graphics outputs include
sideband suppression, the angles for each of the two
chains, and the deviation from target.
- Change or tune the stage
time-constants and you can generate a network with
sideband suppression which is not uniform across the
- Save as an overlay the
current-schematic sideband suppression plot, make
changes and then recall that stored response for
comparison with new data by overlaying the old plotted
data on top of the current plot.
- Use the nearest-value routine to
substitute the nearest 1% or 5% values for the
program-computed values and see the result.
- Use the Monte Carlo mode to see what
happens when real-world parts are used with
user-specified value tolerances.
- Schematic is shown in graphics form.
This is in addition to a conventional "parts list."
- Handles orders 2 through 12, odd and
- Outputs to the printer are not just
screen dumps but are separate high-resolution
- Writes a nice ready-to-run LTspice
file for math confirmation and/or to see the effects of
a real-world op-amp (Tonne Software has no connection
with Linear Technology).