figs09

figs09 - FIGURES FOR CHAPTER 9 S Input Matching Network...

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F IGURES FOR C HAPTER 9 Figure 9-1 Generic amplifer system. P inc RF source DC bias Input Matching Network (IMN) Output Matching Network (OMN) Load P L Γ S Γ L Γ in Γ out [ S ]
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Figure 9-2 Source and load connected to a single-stage amplifer network. P inc P L Γ S Γ L Γ in Γ 11 out [] S Z S V S Z L a 1 b 2 b 1 a 2 b 1 a 2 a 1 b 2 Z S V S Z in b 1 a 1 Γ S Γ in Γ S Γ L a 1 b 2 b 1 a 2 b 1 a 2 a 1 b 2 b 1 a 1 Γ S Γ in b S S 21 S 12 S 22 S 11 b S (b) Signal Flow graph (a) SimpliFied schematics oF a single-stage ampliFier
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Figure 9-3 Stability circle in the complex plane and stability circle in the complex plane. Γ L I Γ L R | | = 1 Γ L | | = 1 Γ in || C out r out C out Γ S I Γ S R | | = 1 Γ S | | = 1 Γ out C in r in C in (a) Output stability circle (b) Input stability circle Γ in 1 = Γ L Γ out 1 = Γ S
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Figure 9-4 Output stability circles denoting stable and unstable regions. Γ L I Γ L R | | = 1 Γ L | | = 1 Γ in || C out r out C out Stable Unstable Γ L I Γ L R | | = 1 Γ L | | = 1 Γ in C out r out C out Stable Unstable (a) Shaded region is stable, since | S 11 | < 1 (a) Stable region excludes the origin, Γ L = 0, since | S 11 | > 1
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Figure 9-5 Input stability circles denoting stable and unstable regions. Γ S I Γ S R | | = 1 Γ S | | = 1 Γ out || C in r in C in Stable Unstable Γ S I Γ S R | | = 1 Γ S | |=1 Γ out C in r in C in Stable Unstable (a) | S 22 | < 1 (b) | S 22 | > 1
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Figure 9-6 Different input stability regions for depending on ratio between and . Γ S I Γ S R | | = 1 Γ S | | = 1 Γ out r in C in Stable Unstable Γ S I Γ S R | | = 1 Γ S | | = 1 Γ out r in C in Stable Unstable (a) r in < | C in | (b) r in > | C in | S 22 1 < r S C in
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Figure 9-7 Unconditional stability in the and planes for . Γ S I Γ S R | |=1 Γ S | |=1 Γ out || C in r in C in Γ out I Γ out R | |=1 Γ out | |=1 Γ S r S C S (a) = 1 circle must reside outside Γ out (b) = 1 circle must reside inside Γ S Γ S Γ out S 11 1 <
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Table 9-1 BFG505W S -parameters as a function of frequency Frequency 500 MHz 750 MHz 1000 MHz 1250 MHz S 11 S 12 S 21 S 22 0.70 57 ° 0.04 47 ° 10.5 136 ° 0.79 33 °
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This note was uploaded on 01/31/2012 for the course EE 4002 taught by Professor Scalzo during the Fall '06 term at LSU.

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figs09 - FIGURES FOR CHAPTER 9 S Input Matching Network...

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