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Unformatted text preview: onstant β . (b) Draw the signal ﬂow graph for the circuit shown.
(c) Derive [S ]T otal using signal ﬂow graph approach.
(d) Derive [T ] for a given [S ] using the following T-parameter deﬁnition.
b1 = T11
a2 (3) (e) Calculate [S ]T otal using [T ] for the same circuit with the following numbers:
βl = π/4
0.09104 − j 0.01507 0.90825 − j 0.03634
0.90825 − j 0.03634 0.09004 − j 0.00646 (4) SB = (6) 0.09004 − j 0.00646 0.90825 − j 0.03634
0.90825 − j 0.03634 0.09104 − j 0.01507 (5) Compare the result with (c).
4. (a) We have shown the expression for transducer power gain GT in class. Is GT a
function of source impedance? Is GT a function of load impedance?
(b) Power gain (GP ) is deﬁned as the ratio between power delivered to the load and
the input power delivered into the newtork (PL /Pin ). Find the expression for
GP using signal ﬂow graph approach. Is GP a function of source impedance? Is
GP a function of load impedance?
(c) Available power gain (Ga ) is deﬁned as the ratio between power available from
network and the power avai...
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This document was uploaded on 02/14/2014 for the course EE 142 at University of California, Berkeley.
- Fall '09