Design of the Dynamic Supply CMOS RF Power Amplifie - Linear CMOS RF Power Amplifiers for Wireless Applications - page 31

Fig. 3.15 B 1 stability factor simulation

Fig. 3.16 ( a ) Source and load stability circles at 5.2 GHz without stability components. ( b )With
stability component R stab1 = 5

outside the Smith chart, a series resistance R stab1 of 5 (the value of the real part
of the impedance at the innermost point of the source stability circle) is placed at
the input. The result shown in Fig. 3.16 (b) confirms that the series resistance really
makes the stability circles fall completely outside of the Smith chart. This translates