Question

Please explain solution.

Q4. Use Inspection only. Assume the transistors are in saturation and gmro>>1, determine the output impedance of the circuits. er Rout or Rout I VOD V61HEM V61 FM M Vb3 WEM2 V625M2 - RG 1" @ er Rout - - Voo Vb216 M2 V63M3 1614FM 16145.M V625M2 V63M 1. L Rout

Answer 1

love O Hovo gmit sro ugsi vgs, 3 vgs. pm Vgsz sro - Im Here Ns, = U6) Apply KCL at Vonode Voli Im, Vgs, zolo vo roj vs, & - 9m vs. = o lo roj YO 315 vo vsi fit gm, ron] +€0( No- gmiroton vo= vs, gm, ro, Tio Croll

Apply ke at Vs, node -tv) to oy VO 9m, vsit Vsi tuon gmi usit us t 9m₂ vs, T roj VO+ PV - = 0 Ym T rol ror rol Ornitoa ushogn, rot Gm, rolt rol -vo arvestusops ovo bolo 8 Vo non 1994 NS - gm, ro, vogt 9 maroproz troue PV-O 9m, ro, No, tgn.no, my tro No = ((9m, ros) Vo 10 lt (e. rojov Imi rout 9 mars to

No= gm, Yor) o + (loro) boz (gmor 9m2) Vor gm, Vonto sol (9m, tams) 9m2 & ro gm, tgn2 J -lgmit Gm2 l gna 17 koot 9ฑา ว่า gne la no

- Small signal guiraleant Vi 71 It Row Rau = V and Vgs = Vg - Vs - o- In Croal 1803) Vgs In Croallroz) In a gmvas + (vx Ia (Voz / 1863) In = – grm In Croallroa) + V - In Croallos) Tr[ + 9m, CV02 || 1o 3) (602/1703>] = va ol In Hout Impro, (602||Y03) + (Yoz/1903). [ not gmivo, (xos 11803 ) + (Yo, Ilves) ] a hare gmirort stenrotll Croal1863)] & soul gonto Rant sont gmoda, Croal1803) Imross Since