Hey I just found this forum and was hoping someone here could help me. I really hope this is the right place for my question!
My teacher gave me a practice exercise to get used to the idea of multistage amplifying circuits. I'm supposed to determine the voltage gain of the two stages.
R1=R2=R
R3=5R
R4=4R
R5=2R
The second stage seems rather straight forward to me (GV2=VO2/VO1).Because VO1=V4 and VO2=-V5 and it seems that I4=I5, the gain for that stage would simply be GV2=((-I4*2R)/4R*I4)=-2R/4R=-0.5
The second stage is proving to be more complicated though. I know this circuit is a non-inverting amplifier and that I should use the same approach (GV1=VO1/Vi). The resistor relationship is really confusing me though. I tried doing it as ((R1+R2||(R3+R4+R5))/((R2||(R3+R4+R5)) but the R3+R4+R5 part seems off..
Thank you so much in advance for any responses xx
Lucia
My teacher gave me a practice exercise to get used to the idea of multistage amplifying circuits. I'm supposed to determine the voltage gain of the two stages.
R1=R2=R
R3=5R
R4=4R
R5=2R
The second stage seems rather straight forward to me (GV2=VO2/VO1).Because VO1=V4 and VO2=-V5 and it seems that I4=I5, the gain for that stage would simply be GV2=((-I4*2R)/4R*I4)=-2R/4R=-0.5
The second stage is proving to be more complicated though. I know this circuit is a non-inverting amplifier and that I should use the same approach (GV1=VO1/Vi). The resistor relationship is really confusing me though. I tried doing it as ((R1+R2||(R3+R4+R5))/((R2||(R3+R4+R5)) but the R3+R4+R5 part seems off..
Thank you so much in advance for any responses xx
Lucia