the question can be found here: http://www.mailfreeonline.com/uploader/04AEED12.jpg
i'm having issues with parts (a) and (d). the rest i think i've done correctly, but it would be helpful if someone could verify my answers.
here are my attempts:
(a) my guess is that the capacitors are there to filter out low-frequency components, and that the 2 resistors are there for biasing purposes. why it would be better to have the second as well as the first, i have no idea.
(b) i got R1 = 43 kO, R2 = 57 kO and R_E = 4.95 kO, but i don't understand why the current flowing through the 2 resistors has to be at least 1 order of magnitude bigger than I_b.
(c) i got my gain to be 1
(d) it has a very high input impedence and could be used as a buffer, right?
again, it's mainly parts (a) and (d) that i need help with. the rest just needs a little verification. thanks in advance
i'm having issues with parts (a) and (d). the rest i think i've done correctly, but it would be helpful if someone could verify my answers.
here are my attempts:
(a) my guess is that the capacitors are there to filter out low-frequency components, and that the 2 resistors are there for biasing purposes. why it would be better to have the second as well as the first, i have no idea.
(b) i got R1 = 43 kO, R2 = 57 kO and R_E = 4.95 kO, but i don't understand why the current flowing through the 2 resistors has to be at least 1 order of magnitude bigger than I_b.
(c) i got my gain to be 1
(d) it has a very high input impedence and could be used as a buffer, right?
again, it's mainly parts (a) and (d) that i need help with. the rest just needs a little verification. thanks in advance