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hw7 - University of California Berkeley EECS 142 Fall 2009...

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University of California, Berkeley Fall 2009 EECS 142 Prof. A. Niknejad Problem Set 7 Due Thursday October 27, 2011 C L L 1 V in R bias I Q C C R L V mid V out V CC V bias R E I Q V CC = 2 . 5V I Q = 2 . 6 mA R bias = 10kΩ C L = 6 . 1pF L 1 = 4nH Q ind = 4 R L = 160Ω R E = 60Ω C C = 100pF BJT Parameters: IS = 1fA BF = 100 V AF = 50V ISE = 300fA NE = 2 BR = 10 NR = 1 V AR = 10V ISC = 200fA NC = 1 RB = 0Ω RE = 0Ω RC = 0Ω CJE = 120fF V JE = . 6V MJE = . 27 TF = 6 . 4ps CJC = 60fF V JC = . 3V We will be analyzing the nonlinear behavior of the cascaded, tuned amplifier shown above. The key to analyzing a relatively complex circuit such as this is to ignore any components that do not affect your signal path and then attack it one stage at a time. Redraw the schematic, replacing as many components as you can with ideal components (as far as the signal is concerned, which devices can you treat as current sources/sinks, as infinite impedances, and as short circuits?). What small signal components can you ignore (i.e., is r o Z L ?). One additional hint:
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