Difference between revisions of "Spin echo generator board (in progress)"
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| − | Low-cost, 800mA RF power amplifier used for tabletop MRI scanners to drive small solenoid coils (~1cm diameter NMR sample tubes). This board uses the Motorola MHW592 RF amplifier module, which is obsolete, but available on eBay. | + | Low-cost, 800mA RF power amplifier used for tabletop MRI scanners to drive small solenoid coils (~1cm diameter NMR sample tubes). This board uses the Motorola MHW592 RF amplifier module, which is obsolete, but available on eBay. The board runs on 24 Volts and includes a linear regulator and blanking circuit controlled by a gating signal from the spectrometer. The blanking cuts power to the RFPA quickly (for instance to eliminate unwanted RF noise during signal readout). |
Revision as of 19:06, 23 November 2020
Low-cost, 800mA RF power amplifier used for tabletop MRI scanners to drive small solenoid coils (~1cm diameter NMR sample tubes). This board uses the Motorola MHW592 RF amplifier module, which is obsolete, but available on eBay. The board runs on 24 Volts and includes a linear regulator and blanking circuit controlled by a gating signal from the spectrometer. The blanking cuts power to the RFPA quickly (for instance to eliminate unwanted RF noise during signal readout).
Datasheet for MHW592:
https://datasheetspdf.com/pdf-file/1114767/Motorola/MHW592/1
Click here to download EAGLE board files (layout and schematic), GERBER files, and Bill of Materials.