Amplifiers Module Prototype for ORNL’s Johnson Noise Thermometry System
- JC - Linear Systems
- Jun 27
- 1 min read
In the recent ORNL technical memo, the Amplifiers Module Prototype stands out as a critical innovation in measuring ultra-low-level thermal noise. This precision front-end circuit features:
Dual-channel preamplifier chains with extremely low inherent noise and high gain, preserving the integrity of micrometer-scale Johnson noise from RTD sensors.
Differential amplifier/filter stage to suppress common-mode interference and maximize signal fidelity.
Autocorrelation across parallel channels that effectively rejects uncorrelated amplifier noise, isolating the true thermometric signal.
🏆 This design is the backbone of ORNL’s efforts to achieve high-accuracy thermodynamic temperature measurements, advancing the precision and reliability of Johnson Noise Thermometry.
👉 Read more in the full report: https://info.ornl.gov/sites/publications/files/pub42765.pdf
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