Radio Frequency Integrated Circuit Design - Webs

302 Radio Frequency Integrated Circuit Design
Figure 8.42 Collector current.
Figure 8.43 Differential output voltage waveform.
This clearly shows the effect of transistor parasitics. This design will have to be
tweaked in simulation in order to make its frequency accurately match what
was asked for at the start. This is best done with a simulator, carefully taking
into account the effect of all stray capacitance. The results of the phase noise
simulation and calculation are shown in Figure 8.46.
8.19 VCO Automatic-Amplitude Control Circuits
The purpose of adding automatic-amplitude control (AAC) to a VCO design is
to create a VCO with good phase noise and very robust performance over