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 networks.
- 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 audio band.
- 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 two through ten, odd and
even.
- Outputs to the printer are not just screen
dumps but are separate high-resolution routines.
- 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).
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