Time-Domain Noise Characterization of LNAs: Validation, Trade-offs, and Analytical Insights
Journal article, 2025
We present a direct method for time-domain noise characterization of transient-state LNAs with ns-level resolution. We validate noise measurements using a time-domain method by comparing them with corresponding NFA-based data at a static reference bias. The trade-off between characterized noise variance and time resolution is investigated. A comprehensive analytical expression linking measured noise variance to noise source temperature and LNA static noise performance is derived. This provides insight for efficient a nd accurate measurements of transient noise and gain in noise-sensitive time-dividing systems.
LNA
noise figure
noise measurement
transient
Author
Yin Zeng
Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory
Jörgen Stenarson
Low Noise Factory AB
Peter Sobis
Low Noise Factory AB
Jan Grahn
Chalmers, Microtechnology and Nanoscience (MC2), Terahertz and Millimetre Wave Laboratory
Arftg Microwave Measurement Conference Arftg
28361407 (ISSN) 27678776 (eISSN)
2025Pulsed low-noise amplifiers for quantum information systems
VINNOVA (2022-00830), 2022-07-01 -- 2024-06-30.
Subject Categories (SSIF 2025)
Signal Processing
DOI
10.1109/ARFTG63706.2025.10989792