- #1
Physixs
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Hello,
Thanks so much for all the previous help. I will probably be using this forum a lot this semester because my textbook is not very helpful. So thank you in advance.
I am trying to create a comparison table of CE CC and CB amplifiers to help me study. However, I cannot find the "exact" information I am looking for online (concerning certain aspects of each). I am not sure if what I am trying to accomplish is too ambiguous (the characteristics of each type of amplifier changes too greatly based on the parameters of the circuit) or not.
Please let me know if I did anything wrong. The "?" are things I am not sure about since several online sites I have read have said different things.
Zin: CE is High (or very high?), CC is Very High, CB is very low
Zout: CE is High (or very high?), CC is Very low, CB is High (or very high?)
Voltage Gain: CE is medium (-RC/RE), CC is about 1, CB is (RC/RE?? I've read a few variations)
Current Gain: CE is Beta, CC is Beta + 1, CB is about 1
The main one websites either don't mention or are contradicting about is power gain...
CE the power gain is high (due to high voltage and current gains, P = VI, this makes sense but shouldn't power gain be Very high? not just high? This is confusing me because of the CC reason I listed below)
CC the power gain is High (this didn't make much sense to me because when I reference the power gain in a CE, it seems off. If a CE's power gain is P=VI with an increase in current and voltage gains, how can that power gain be ony "high" if in a CC only the current is amplified and therefore in P=VI, since voltage does not change (voltage gain is slightly less than 1), how can the power gain be similar to a CE? Shouldnt the power gain of a CE be significantly larger than a CC in realtively similar circuits and conditions?)
CB the power gain is a huge?? Some websites say it hase a power gain of 1. Some websites say it has a power gain that is large. Some say that is small. My textbook doesn't even mention it for a CB. I have no idea what to say here.
Finally, my last question about all three amplifiers, I was reading ahead in my text. Would it be safe to say that they are all Class A power Amplifiers? I was a little lost on this idea too. Since they all amplify power, I thought it would be ok to say all single stage CC, CE, CB amplifiers could be classified as Class A. Where I thought this might not be true was with a CE. Since the CE inverts the output, does that still count as a "linear" relationship between Vin and Vout? If so it is a class A and if not, I am more puzzled.
Thank you so much! This forum has be a huge help to me in all my classes
Thanks so much for all the previous help. I will probably be using this forum a lot this semester because my textbook is not very helpful. So thank you in advance.
I am trying to create a comparison table of CE CC and CB amplifiers to help me study. However, I cannot find the "exact" information I am looking for online (concerning certain aspects of each). I am not sure if what I am trying to accomplish is too ambiguous (the characteristics of each type of amplifier changes too greatly based on the parameters of the circuit) or not.
Please let me know if I did anything wrong. The "?" are things I am not sure about since several online sites I have read have said different things.
Zin: CE is High (or very high?), CC is Very High, CB is very low
Zout: CE is High (or very high?), CC is Very low, CB is High (or very high?)
Voltage Gain: CE is medium (-RC/RE), CC is about 1, CB is (RC/RE?? I've read a few variations)
Current Gain: CE is Beta, CC is Beta + 1, CB is about 1
The main one websites either don't mention or are contradicting about is power gain...
CE the power gain is high (due to high voltage and current gains, P = VI, this makes sense but shouldn't power gain be Very high? not just high? This is confusing me because of the CC reason I listed below)
CC the power gain is High (this didn't make much sense to me because when I reference the power gain in a CE, it seems off. If a CE's power gain is P=VI with an increase in current and voltage gains, how can that power gain be ony "high" if in a CC only the current is amplified and therefore in P=VI, since voltage does not change (voltage gain is slightly less than 1), how can the power gain be similar to a CE? Shouldnt the power gain of a CE be significantly larger than a CC in realtively similar circuits and conditions?)
CB the power gain is a huge?? Some websites say it hase a power gain of 1. Some websites say it has a power gain that is large. Some say that is small. My textbook doesn't even mention it for a CB. I have no idea what to say here.
Finally, my last question about all three amplifiers, I was reading ahead in my text. Would it be safe to say that they are all Class A power Amplifiers? I was a little lost on this idea too. Since they all amplify power, I thought it would be ok to say all single stage CC, CE, CB amplifiers could be classified as Class A. Where I thought this might not be true was with a CE. Since the CE inverts the output, does that still count as a "linear" relationship between Vin and Vout? If so it is a class A and if not, I am more puzzled.
Thank you so much! This forum has be a huge help to me in all my classes