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iSpin-NMR
X. Pre-amplifier Filter Selection
Considerations
The iSpin-NMR receiver is very sensitive to small signals and has a broad input frequency range for
maximum versatility. While this feature can be very useful, the broadband receiver may capture
unwanted noise if not used correctly. At SpinCore, we customize your iSpin-NMR system to your
specific operating frequency and can provide custom band-pass filters at those specific
frequencies. Contact SpinCore Technologies for more information.
Figure 18, on the following page, shows the iSpin-NMR receiver sensitivity when connected to a 72
MHz RF signal that is attenuated by 120 dB down to less than 1.8 μV peak-to-peak. The left side
shows received data using a 98 MHz low-pass filter, and the right side shows received data when
using a 72 MHz band-pass filter. The performance benefits of the band-pass filter are clear.
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Figure 18: iSpin-NMR Receiver performance using low-pass filters (left) and band-pass filters (right).