A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
Low‐noise preamplifier with input and feedback transformers for low source resistance sensors
1992
Review of Scientific Instruments
Preserved Fulltext
We describe the design, schematics, and performances of a very-low-noise, low-frequency preamplifier. It operates in the 5 Hz-100 kHz range and offers an input equivalent voltage noise density as low as 65 pV/ ,/I%; the current noise increases with frequency and settles to about 1.5 pA/ @ at 100 kHz. The amplifier uses input and feedback signal transformers and operates in full differential mode; a -163 dB common-mode rejection ratio is achieved at line frequency. Design methodology is applicable to other ranges of frequencies.
doi:10.1063/1.1143171
fatcat:zyvlx2actbguhjrlyl6rjhdagu