所有的电压源都具有内阻，所以所有的电压源都会产生约翰逊噪声。
All voltage sources have internal resistance, so all voltage sources develop Johnson noise.
约翰逊噪声给出了可以达到的电压或电流测量分辨率的理论极限值。
Johnson noise imposes a theoretical limit to achievable voltage or current resolution.
所有真实的电压源和电流源都具有内阻，所以它们都表现出约翰逊噪声。
All real voltage and current sources contain an internal resistance; therefore, they exhibit Johnson noise.
所有真实的电压源和电流源都具有内阻，所以它们都表现出约翰逊噪声。
All real voltage and current sources contain an internal resistance; therefore, they exhibit Johnson noise.
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