Difference between revisions of "A Termination Insensitive Amplifier for Bidirectional Transceivers"
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* NGSPICE run from KiCAD | * NGSPICE run from KiCAD | ||
* +24 dB @12V | * +24 dB @12V | ||
| + | * 2N3904 pin order | ||
| + | ** KiCAD order | ||
| + | ** NGSPICE order | ||
[[file:W7ZOI_Simulation_KiCAD-3.PNG]] | [[file:W7ZOI_Simulation_KiCAD-3.PNG]] | ||
Revision as of 13:00, 30 October 2021
Contents
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
Schematic in KiCAD
- Single channel
- With SPICE directives
- Both channels
- With SPICE directives
NGSPICE Simulation
- NGSPICE run from KiCAD
- +24 dB @12V
- 2N3904 pin order
- KiCAD order
- NGSPICE order
- Closely matches
- Across Band
CAD
SMT Build
