Thermal noise is a type of noise that is produced when electrons move rapidly and randomly within a conductor due to thermal agitation. Determine the following for an amplifier operating at a temperature of 27°C and a bandwidth of 20 kHz. Assume that the ambient temperature is 290 Kelvin. (a) (i) the thermal noise power in watts and dBm. (ii) the RMS noise voltage for a 60 N internal resistance and a 60 Q load resistance. (iii) the increase in thermal noise power in dB if the temperature increased to 70°C. (iv) the increase in thermal noise power caused by doubling the bandwidth.

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Thermal noise is a type of noise that is produced when electrons move rapidly and
randomly within a conductor due to thermal agitation. Determine the following for
an amplifier operating at a temperature of 27°C and a bandwidth of 20 kHz. Assume
that the ambient temperature is 290 Kelvin.
(i)
the thermal noise power in watts and dBm.
(ii)
the RMS noise voltage for a 60 Q internal resistance and a 60 Q load
resistance.
(iii)
the increase in thermal noise power in dB if the temperature increased to
70°C.
(iv)
the increase in thermal noise power caused by doubling the bandwidth.
Transcribed Image Text:Thermal noise is a type of noise that is produced when electrons move rapidly and randomly within a conductor due to thermal agitation. Determine the following for an amplifier operating at a temperature of 27°C and a bandwidth of 20 kHz. Assume that the ambient temperature is 290 Kelvin. (i) the thermal noise power in watts and dBm. (ii) the RMS noise voltage for a 60 Q internal resistance and a 60 Q load resistance. (iii) the increase in thermal noise power in dB if the temperature increased to 70°C. (iv) the increase in thermal noise power caused by doubling the bandwidth.
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