Radio Frequency Integrated Circuit Design - Webs

212 Radio Frequency Integrated Circuit Design
Figure 7.12 Noise simulation results.
example, we will show the typical relative levels of these noise components.
Many simulators could provide the information for this analysis, but instead
of discussing the simulation, the results will be discussed here.
Table 7.1 shows the noise from various sources and from various frequencies.
Noise has been expressed as a voltage or as a squared voltage instead of a
density by assuming a bandwidth of 1 MHz. Noise from the bottom components
(RF input transistors, current sources, input resistors, and bias resistors) has
been further broken down in Table 7.2. Noise from the source resistor (R SR,
top line of Table 7.1) has been shown in brackets, as its effect is also included
with total bottom noise.
The final row in Table 7.1 shows for each specified input frequency, the
total number of equivalent frequency bands that have approximately the same
noise. For example, for every noise input at the RF, there is an approximately