hello sir , thank you for this valuable lecture, i have a doubt about the Rin which equal to 5k in your calculation , But Rin = R1//R2 + RinbaseAC R1//R2 = 9.2K and RinbaseAC= Beta (rtr +R3 ) = 100 ( 26+76) =10K => Rin = 10K + 9.2K = 19.5K not 5K ? Correct me if i'm wrong please
This is collage level math. Thev theory is too. I think you lost most people. But as an amplifier you must run the transistor in the active region to cut distortion I believe.
He said the resistor Rc in part I video was chosen at a value because of the halfway of the load line emitter current to incorporate the AC signal with the DC signal to be optimal (he taught that in the last lecture). That was a great part in his last lecture I enjoyed since it is more necessary in MOSFETs designs where high frequencies are in the amplified voltages using them over BJTs.
Yes, it s not easy stuff. I highly recommend watching part one first since i explain the dc bias setup. And you are absolutely right, the operaring poing or quiescent point should be at the middle of the dc load line so that the ac swings around the dc op point stay in the linear region.
I like the consent immensely, but I find I need to pause and reverse engineer some of the mathematics, as you don't really let us know where you are going with it. It would be nice to have a little more of the algebraic steps shown so that we can concentrate on transistor theory rather than the algebra. Still... great content thanks.
Can somebody explain me how the trans resistance (Rtr) is calculated (26mV thing)? Did I missed an earlier video ?
Hi, this is a canned formula that you have to accept. It is not something that you can derive. Hope this helps.
@@electronicsainteasy5253
Thank you very much.
hello sir , thank you for this valuable lecture,
i have a doubt about the Rin which equal to 5k in your calculation , But Rin = R1//R2 + RinbaseAC
R1//R2 = 9.2K
and RinbaseAC= Beta (rtr +R3 ) = 100 ( 26+76) =10K
=> Rin = 10K + 9.2K = 19.5K not 5K ?
Correct me if i'm wrong please
This is collage level math. Thev theory is too. I think you lost most people. But as an amplifier you must run the transistor in the active region to cut distortion I believe.
He said the resistor Rc in part I video was chosen at a value because of the halfway of the load line emitter current to incorporate the AC signal with the DC signal to be optimal (he taught that in the last lecture). That was a great part in his last lecture I enjoyed since it is more necessary in MOSFETs designs where high frequencies are in the amplified voltages using them over BJTs.
Yes, it s not easy stuff. I highly recommend watching part one first since i explain the dc bias setup. And you are absolutely right, the operaring poing or quiescent point should be at the middle of the dc load line so that the ac swings around the dc op point stay in the linear region.
Thank you for your comment.
I like the consent immensely, but I find I need to pause and reverse engineer some of the mathematics, as you don't really let us know where you are going with it. It would be nice to have a little more of the algebraic steps shown so that we can concentrate on transistor theory rather than the algebra. Still... great content thanks.