Hi:
I am looking for confirmation regarding the input and output impedance of this
class AB amplifier. See attached.
Assume IE1 = 42.261 mA and Rs = 2.2KΩ
Assume βac1 = 223
Thanks
RS
I am looking for confirmation regarding the input and output impedance of this
class AB amplifier. See attached.
Assume IE1 = 42.261 mA and Rs = 2.2KΩ
r'e1 = 25 mV / IE1  0.589  Ω  
re1 = RE1║RL  0.008  KΩ  
Rin(base) = βac1 * (r'e1 + re1)  0.133  KΩ  
Rin(total) = Rin(base)║RB1║RB2  0.054  KΩ 
Assume βac1 = 223
Rout = (Rs / βac1)║re1  0.006  KΩ 
Thanks
RS
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