(a) Two pn junctions having Is1 5 1 fA and Is2 5 5 fA are connected in series and forward biased via a common 1-V source. Assuming VT 5 26 mV, fi nd the individual voltage drops as well as the common...

(a) Two pn junctions having Is1 5 1 fA and Is2 5 5 fA are connected in series and forward biased via a common 1-V source. Assuming VT 5 26 mV, fi nd the individual voltage drops as well as the common current. Hint: use v 5 VT ln (iyIs ). (b) If the diodes are connected in parallel and forward biased via a common 1-mA source, fi nd their individual currents as well as the common voltage drop.