amr.attaby
06-04-2010, 09:46 PM
This is a solution for pb 1 in Final Exam 2006
1) All are Class-B Push Bull PA
a- Normal Class-B
b- Class-B PA with -ve FB
c- Differential Class-B PA
2) all are pi/4
3) b --> because THD is improved by 1+beta*A --> best SNDR
4) a --> because we don't have extra Amp's that consume power.
5) c --> because the peak voltage on the load = 2Vcc
Pc = 4*Pb = 4*Pa
6) do it as normal
1) All are Class-B Push Bull PA
a- Normal Class-B
b- Class-B PA with -ve FB
c- Differential Class-B PA
2) all are pi/4
3) b --> because THD is improved by 1+beta*A --> best SNDR
4) a --> because we don't have extra Amp's that consume power.
5) c --> because the peak voltage on the load = 2Vcc
Pc = 4*Pb = 4*Pa
6) do it as normal