Difference between pages "SMA-HDRS" and "A Termination Insensitive Amplifier for Bidirectional Transceivers"
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| − | [[file: | + | [[file:W7ZOI_TIA_3D.png]] |
| − | == | + | == W7ZOI Design == |
| − | + | Paper - [http://w7zoi.net/bidirectional_matched_amplifier.pdf A Termination Insensitive Amplifier for Bidirectional Transceivers] - W7ZOI (Wes Hayward) design | |
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| − | + | * 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 | ||
| − | + | [[FILE:W7ZOI_SCHEMATIC.PNG]] | |
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| − | + | == Schematic in KiCAD == | |
| − | + | * Single channel | |
| + | * With SPICE directives | ||
| − | + | [[file:W7ZOI_SCHEMATIC_KiCAD.PNG]] | |
| − | [[file: | + | * Both channels |
| + | * With SPICE directives | ||
| + | |||
| + | [[file:W7ZOI_SCHEMATIC_KiCAD-2.PNG]] | ||
| + | |||
| + | == NGSPICE Simulation == | ||
| + | |||
| + | * NGSPICE run from KiCAD | ||
| + | ** [http://ngspice.sourceforge.net/ngspice-eeschema.html Tutorial: ngspice simulation in KiCad/Eeschema] | ||
| + | * +24 dB @12V | ||
| + | * 2N3904 Alternate Node Sequence (MMBT3903 - SOT23) | ||
| + | ** KiCAD order 1 2 3 is the SPICE normal order | ||
| + | ** NGSPICE order: 3 1 2 | ||
| + | |||
| + | [[file:W7ZOI_Simulation_KiCAD-3.PNG]] | ||
| + | |||
| + | * Closely matches | ||
| + | |||
| + | [[file:W7ZOI_Gainz.PNG]] | ||
| + | |||
| + | * Across Band | ||
| + | [[file:W7ZOI_Simulation_KiCAD_S2.PNG]] | ||
| + | |||
| + | == CAD == | ||
| + | |||
| + | [[FILE:W7ZOI_CAD.PNG]] | ||
| + | |||
| + | == SMT Build == | ||
| + | |||
| + | [[FILE:W7ZOI_TIA_SMD_3D.png]] | ||
| + | |||
| + | [[FILE:W7ZOI_TIA_SMT_CAD.PNG]] | ||
| + | |||
| + | == Videos == | ||
| + | |||
| + | <video type="youtube">JjcxEYk9atg</video> | ||
| + | |||
| + | == Assembly Sheet == | ||
| + | |||
| + | * [[W7ZOI TIA Assembly Sheet - Rev 1]] | ||
Revision as of 10:10, 12 November 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 Alternate Node Sequence (MMBT3903 - SOT23)
- KiCAD order 1 2 3 is the SPICE normal order
- NGSPICE order: 3 1 2
- Closely matches
- Across Band
CAD
SMT Build
Videos
