(a) Two IC noise sources en1 and en2 of the type of Eq. (7.125) are in series with each other. Show that the equivalent noise en of the combination of the two sources is still of the type of Eq....

(a) Two IC noise sources en1 and en2 of the type of Eq. (7.125) are in series with each other. Show that the equivalent noise en of the combination of the two sources is still of the type of Eq. (7.125) by deriving expressions for its white-noise fl oor enw and corner frequency fce. (b) If en1 has enw1 5 30 nVHz and fce1 5 400 Hz, and en2 has enw2 5 40 nV/ √ Hz and fce2 5 100 Hz, fi nd enw and fce.