and 5 others joined a min ago.
0
465views
The output resistance of a source follower is
(a) Low (b) Moderate
(c) High (d) None of the above
1 Answer
0
2views
written 3.5 years ago by
teamques10
★ 67k
|
Answer: (a)Low
The small signal model of common drain (source follower) circuit is shown.
OUTPUT PART OF COMMON DRAIN CIRCUIT TO CALCULATE OUTPUT IMPEDANCE
Thus, the value of output impedance can be evaluated
$\LARGE R_{out} = {1\over{g_m+{1\over{{r_o}}||{r_c}}}} = {1\over{g_m}}$
The value of $\large g_m$ is made large enough,so the resultant output impedance is low for Source Follower Circuit.
ADD COMMENT
EDIT
Please log in to add an answer.