Difference between revisions of "A Termination Insensitive Amplifier for Bidirectional Transceivers"

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* 2N3904 pin order
 
* 2N3904 pin order
 
** KiCAD order  
 
** KiCAD order  
−
** NGSPICE order
+
** NGSPICE order: 3 1 2
  
 
[[file:W7ZOI_Simulation_KiCAD-3.PNG]]
 
[[file:W7ZOI_Simulation_KiCAD-3.PNG]]

Revision as of 13:17, 30 October 2021

W7ZOI TIA 3D.png

W7ZOI Design

Paper - A Termination Insensitive Amplifier for Bidirectional Transceivers - W7ZOI (Wes Hayward) design

  • Termination Insensitive - input impedance that does not depend upon the output load
  • Bi-directional - amplifiers in both directions
  • 50 ohms in/out
  • BNC or SMA Connectors
  • Transformer-less
  • Power applied to one half at a time - determines signal flow direction
  • Use
    • Between RF/LO mixer (IF output/input) and crystal filter
    • Between Crystal Filter and Product Detector / Balanced Modulator

W7ZOI SCHEMATIC.PNG

Schematic in KiCAD

  • Single channel
  • With SPICE directives

W7ZOI SCHEMATIC KiCAD.PNG

  • Both channels
  • With SPICE directives

W7ZOI SCHEMATIC KiCAD-2.PNG

NGSPICE Simulation

W7ZOI Simulation KiCAD-3.PNG

  • Closely matches

W7ZOI Gainz.PNG

  • Across Band

W7ZOI Simulation KiCAD S2.PNG

CAD

W7ZOI CAD.PNG

SMT Build

W7ZOI TIA SMD 3D.png

W7ZOI TIA SMT CAD.PNG

Assembly Sheet

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