Difference between revisions of "A Termination Insensitive Amplifier for Bidirectional Transceivers"
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== W7ZOI Design == | == W7ZOI Design == | ||
| − | + | Paper [http://w7zoi.net/bidirectional_matched_amplifier.pdf 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 | * Use | ||
** Between RF/LO mixer (IF output/input) and crystal filter | ** Between RF/LO mixer (IF output/input) and crystal filter | ||
Revision as of 19:21, 29 October 2021
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
- Closely matches
- Across Band
CAD
