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Recap of Lesson 1 - Coggle Diagram
Recap of Lesson 1
AC analysis
to obtain the voltage gain
AC emitter resistance
π
π=π½
π»/π°
π¬ =ππππ½/π°
π¬
Differential Mode gain
π¨
π π=πΉ
πͺ/(ππ_π )
Common Mode gain
π¨
ππ=πΉ
πͺ/(ππΉ_π¬ )
Common Mode Rejection Ratio
CMRR =π¨
π π/π¨
ππ
"CMRR" ("dB" )=ππγ"log" γ
"10" |π¨
π π/π¨_ππ |
NPN Differential Amplifier
RE is connected to Vee
Rc is connected to Vcc
π½
πͺ=π½
πͺπͺβπ½_πΉπͺ
π°
πΉπ¬=(π½
π¬βπ½
π¬π¬)/πΉ
π¬
PNP Differential Amplifier
RE is connected to Vcc
Rc is connected to Vee
, π½
πͺ=π½
π¬π¬+π½_πΉπͺ
π°
πΉπ¬=(π½
ππβπ½
π¬)/πΉ
π¬
DC analysis
determine the conditions for the desired operating point
π°
π¬=π°
πΉπ¬/π
π°
πͺ=π°
π¬
π°
π©=π°
πͺ/π·
VOUT1 = VOUT2 = VC