We are developing voltage low noise differential amplifier in the DC - 100 MHz frequency range (See AwaXe in Article SiGe Integrated Circuit Developments for SQUID/TES Readout
). However, with input noise
Dear Dr Ijaz Durrani,
- Thanks for the interesting paper. Yes, double the readout amplifier, could be a way to fight 1/f noise ... adding complexity and cost too.
- About the materials of SR445, the datasheet https://www.thinksrs.com/downloads/pdfs/catalog/SR445Ac.pdf limits the information to the white noise only (that's one of the reason of my question). In the user manual https://www.thinksrs.com/downloads/pdfs/manuals/SR445Am.pdf, it start to appear low frequency noise performances, yes :
Noise (10Hz) 22nV/√Hz
Noise (100Hz) 8.6nV/√Hz
Noise (> 1kHz) 5.2nV/√Hz
So this is compatible with a corner frequency between 10 to 100 Hz. I will be happy to have feedback of users, and the low frequency performance effectively observed using this SR445A amplifier.
Anyway, I'll further read the paper Cross-spectrum Analyzer for Low Frequency Noise Analysis https://arxiv.org/pdf/1408.2470.pdf which could be interesting to apply to our applications.
Many thanks
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