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3. The noise temperature of an amplifier, as defined in the notes, can be found by switching its input between two identical resistors at different temperatures, T, and Te The mean squared noise voltage at the output is found to be V2 and V2 respectively Show that the noise temperature of the amplifier is given by, CH Amp Vnoise TH TChe noise temperature of an amplifier, as defined in the notes, can be found by switching its input between two identical resistors at different temperatures, TH and TC . The mean squared noise voltage at the output is found to be 2 VH and 2 VC respectively. Show that the noise temperature of the amplifier is given by,

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