Hello all,
I'm in an advanced physics lab course which is more or less an electronics lab. The textbook and student manual we use are from Horowitz/Hill's The Art of Electronics. I will freely admit that I am no dab hand at electronics, less so with the design behind them.
Thus my latest assignment has me a bit befuddled. It doesn't help that the professor of the course does not really explain things clearly, nor is the textbook/manual clear and easy-to-understand. I'm not simply looking to get the problem solved; I'd also like to understand the process so I don't have to continue asking for help.
Anyway, on to the problems.
1) Design of an emitter follower with capacitive input and output coupling, using a 2N3904 transistor. Parameters are:
Quiescent current: 1 milli-amp
Signal range: 100Hz-20kHz
R-out of the source to the circuit: 10kΩ
Supply voltage is single-ended, +15V to ground
2) Design of a common emitter amplifier. Parameters are:
Vcc = +15V
Signal range: 100Hz-20kHz
Gain: -50
Quiescent current: 1 milli-amp
Supply voltage is single-ended, +15V to ground
Additionally, a voltage divider allowing me to reduce a function generator output by a factor of ten (the generator is the input for this particular circuit).
Now, I've completed #1 (I think), and I've attached the work for that so that it can be evaluated/checked for errors. #2, however, has me entirely confused at the moment. I know that the resistance of the collector will be 50x the emitter resistor. The 3dB-point for frequency should be <100Hz. I'm trying to follow through the book(s) but it's not really clear to me. I don't have much as far as calculations for #2 yet, so any pointers before I get going would be great. (Again I'm looking to understand the process and the mathematics behind it so I can do it myself without feeling bamboozled.)
Thanks for any help!
I'm in an advanced physics lab course which is more or less an electronics lab. The textbook and student manual we use are from Horowitz/Hill's The Art of Electronics. I will freely admit that I am no dab hand at electronics, less so with the design behind them.
Thus my latest assignment has me a bit befuddled. It doesn't help that the professor of the course does not really explain things clearly, nor is the textbook/manual clear and easy-to-understand. I'm not simply looking to get the problem solved; I'd also like to understand the process so I don't have to continue asking for help.
Anyway, on to the problems.
1) Design of an emitter follower with capacitive input and output coupling, using a 2N3904 transistor. Parameters are:
Quiescent current: 1 milli-amp
Signal range: 100Hz-20kHz
R-out of the source to the circuit: 10kΩ
Supply voltage is single-ended, +15V to ground
2) Design of a common emitter amplifier. Parameters are:
Vcc = +15V
Signal range: 100Hz-20kHz
Gain: -50
Quiescent current: 1 milli-amp
Supply voltage is single-ended, +15V to ground
Additionally, a voltage divider allowing me to reduce a function generator output by a factor of ten (the generator is the input for this particular circuit).
Now, I've completed #1 (I think), and I've attached the work for that so that it can be evaluated/checked for errors. #2, however, has me entirely confused at the moment. I know that the resistance of the collector will be 50x the emitter resistor. The 3dB-point for frequency should be <100Hz. I'm trying to follow through the book(s) but it's not really clear to me. I don't have much as far as calculations for #2 yet, so any pointers before I get going would be great. (Again I'm looking to understand the process and the mathematics behind it so I can do it myself without feeling bamboozled.)
Thanks for any help!
Attachments
-
28.5 KB Views: 94