MODELING OF ANALOG BLOCKS IN VERILOG-A
Figure 10-3. AC response of the LNA
Figure 10-4 shows the noise figure (NF) of the model according to the
parameter fnoise = 5 dB. The noise figure is the ratio of SNR
is usually expressed in terms of dB. Using SpectreRF the noise figure could
be calculated with the PNoise analysis, which is a periodic small-signal
analysis. In circuit level models the noise figure depends on the frequency.
Figure 10-4. Noise figure of the LNA
The next LNA parameter is the 3rd order Intercept Point (IP3). The
measurement results are achieved by a combined PSS/PAC analysis using
two tones of 1 kHz and 1.1 kHz. Figure 10-5 depicts the IP3 of
approximately 1.9 dBm. A detailed explanation of the IP3 can be found in
AC response of the LNA Figure 10-4 shows the noise figure (NF) of the model according to the parameter fnoise = 5 dB.