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热噪声 Thermal noise
热噪声在线计算
https://www.daycounter.com/Calculators/Thermal-Noise-Calculator.phtmlV n _ R M S = 4 K B T R Δ f i n V r m s V_{n\_RMS} = \sqrt{4K_BTR\Delta{f}} \ in \ V_{rms} Vn_RMS=4KBTRΔf in Vrms
v n = 4 K B T R i n V / H z v_n = \sqrt{4K_BTR}\ in \ V/\sqrt{Hz} vn=4KBTR in V/Hz
i n = 4 K B T / R i n A / H z i_n = \sqrt{4K_BT/R}\ in \ A/\sqrt{Hz} in=4KBT/R in A/Hzin dB
d B V = 20 l o g 10 ( V ) dBV = 20log_{10}(V) dBV=20log10(V)SR760
https://www.thinksrs.com/downloads/pdfs/manuals/SR760m.pdf
SR570
https://www.thinksrs.com/products/sr570.html
R Vn (RMS) Vn (RMS) Vn_dB (RMS) In (RMS) G Vn_m (RMS) Vn_m (RMS) Vn_m_dB (RMS) ohm V/Hz^(1/2) nV/Hz^(1/2) dBV/Hz^(1/2) A/Hz^(1/2) A/V V/Hz^(1/2) nV/Hz^(1/2) dBV sqrt(4kBT*R) sqrt(4kBT*R) sqrt(4kBT/R) sqrt(4kBT/R)/G sqrt(4kBT/R)/G 2k 2.00E+03 5.75E-09 5.8 -164.8 2.88E-12 1.00E-06 2.88E-06 2877.5 -110.8 5k 5.00E+03 9.10E-09 9.1 -160.8 1.82E-12 1.00E-06 1.82E-06 1819.9 -114.8 10k 1.00E+04 1.29E-08 12.9 -157.8 1.29E-12 1.00E-06 1.29E-06 1286.9 -117.8 1M 1.00E+06 1.29E-07 128.7 -137.8 1.29E-13 1.00E-06 1.29E-07 128.7 -137.8 2.2M 2.20E+06 1.91E-07 190.9 -134.4 8.68E-14 1.00E-06 8.68E-08 86.8 -141.2 6.8M 6.80E+06 3.36E-07 335.6 -129.5 4.93E-14 1.00E-06 4.93E-08 49.3 -146.1 10M 1.00E+07 4.07E-07 406.9 -127.8 4.07E-14 1.00E-06 4.07E-08 40.7 -147.8 ref
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- 原文地址：https://blog.csdn.net/Jelly_Zhou/article/details/126261385