Download Inverse Transmission Parameter

Hybrid (H) Parameter
• The third possible set of parameters is
known as hybrid parameters or hparameters.
• The input and output terminal current
and voltage can be presented as follow:
(V 1, I 2)  f (I1,V 2)
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V1  h 11
 I   h
 2   21
h12   I1 
h22  V2 
V1 = h11I1 + h12V2
I2 = h21I1 + h22V2
Where
h=
h 11
h
 21
h12 
h22 
These parameters are very useful in analyzing the transistor compare to
the z-parameters and y-parameters.
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Case –I Assuming the output of the two port to be
short circuit, V2 =0
short circuit input impedance
short circuit forward current gain
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Case –II Assuming the input of the same two port to
be open circuit, II =0
open circuit reverse voltage gain
open circuit output admittance
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Circuit based on π network
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Circuit based on T network
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INTERCONNECTION OF TWO-PORT
NETWORKS
Three ways that two ports are interconnected:
Y parameters
ya
* Parallel
 y ya  
yb
Z parameters
z  za  
za
* Series
yb 
zb
zb 
ABCD parameters
* Cascade
Ta
Tb
T  Ta  Tb 
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Interconnections permit the description of complex systems in terms of simpler
components or subsystems
The basic interconnections to be considered are: parallel, series and cascade
PARALLEL: Voltages are the same.
Current of interconnection
is the sum of currents
SERIES: Currents are the same.
Voltage of interconnection is the sum
of voltages
CASCADE:
Output of first subsystem
acts as input for the
second
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Find the equivalent y-parameters for
the bridge T-network
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the z-parameters of network N2 are
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We can convert the z-parameters to y-parameters
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