Gift: SPICE Double Balanced Mixer Component

AI Thread Summary
A user created a zipped file containing a symbol, schematic, and .sub file for a double balanced mixer component for LTSpice, aimed at helping learners understand mixers and IQ modulation. However, the forum moderator deleted the zip file due to security concerns and requested that individual files be posted instead. Instructions were provided for users to properly integrate the mixer component into LTSpice, including file placement and setup steps. The discussion also included a suggestion to save a pre-configured mixer setup as a template for future experiments. The thread emphasizes the importance of sharing files in a secure manner while facilitating learning in circuit simulation.
Sam Gallagher
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<< Mentor Note -- ZIP files are a security risk, and the file has been deleted. Please post the individual files instead. Thanks >>[/color]

I saw a post from 2009 of someone who needed a mixer component to play with. So for learning purposes I zipped a symbol, schematic, and .sub file together for LTSpice of the double balanced mixer that was given in that thread so that anyone that's learning about mixers or IQ modulation can play with it without dealing with a messy schematic!

Instructions:
  • Unzip the file

  • Place .sub file in your LTSpiceVI\lib\sub folder (for windows this is in Program Files(x86)*\LTC)
*If you're running 32 bit windows it's just program files

  • Place the .asy (symbol) file in your symbol folder (also found in lib I'm pretty sure)

In LTSPICE: (You'll have to do this when you want to use the mixer, because LTSpice is a pain sometimes)
  • Place the mixer symbol

  • Ctrl+right click, change "Value" row to "DBMixer"

  • Include the subcircuit in your netlist with a SPICE directive (.op button)
It should say ".lib DBMixer.sub"
Don't forget the .sub part.

  • Use the mixer!

  • Bonus tip: Save a file with the mixer all set up as "mixer template" and use that to start when you want to do a quick mixer experiment.
Use all the mixers you want, you crazy kids.

Example: Basic IQ modulation by mixing (which is multiplying) a sine wave by +1V and -1V (a square wave)
upload_2015-8-18_15-49-55.png


Until next time
~Sam Gallagher
 
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Due to the forum's policy on .zip files I can no longer post the files, sorry all.
 

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