Explicitly Simulate Resistor Thermal Noise
Noise block to calculate the classic thermal noise floor,
kT, for a matched resistor circuit. Model configuration is as follows:
Time step of the model is 1e-6 and frequency is 2 GHz.
Resistornoise source is modelled explicitly to make it noiseless. The resistance is 50 ohms. In the Resistor blocks, Simulate Noise is not selected.
Noisecurrent source parallel to the
Resistorblock models the noise. In the
Noiseblock, the Source type is set to Ideal current to make it a current source. The Noise spectral density is defined as (4kT/R)(A2/Hz). The value of
kis * The Masked block, Calculate Noise Power, calculates the noise floor as a standard deviation of the output signal.
To run the model, select Simulation > Run. With the bandwidth included using the Configuration block, noise power is in the range of -173.98 to 174.1 dBm