Time-Domain Noise Characterization of LNAs: Validation, Trade-offs, and Analytical Insights

Artikel i vetenskaplig tidskrift, 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.