How can we find h parameters from the common base configuration?
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Common-Base Configuration (CB)
The CB configuration having a low input and high output impedance and a current gain less
than 1, the voltage gain can be quite large, ro in MΩ so that ignored in parallel with RC
Fig6-22 CB configuration Fig6-23 re equivalent circuit
Zi
[6-54]
Zo
[6-55]
Av
[6-56]
Ai Assuming RE >> re
[6-57]
Phase Relationship: the resulting equation for the Av is a positive reveals that the output Vo
and input Vi are in phase for the common-base configuration
The CB configuration having a low input and high output impedance and a current gain less
than 1, the voltage gain can be quite large, ro in MΩ so that ignored in parallel with RC
Fig6-22 CB configuration Fig6-23 re equivalent circuit
Zi
[6-54]
Zo
[6-55]
Av
[6-56]
Ai Assuming RE >> re
[6-57]
Phase Relationship: the resulting equation for the Av is a positive reveals that the output Vo
and input Vi are in phase for the common-base configuration
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