Question

Electronics eng

Name: 1. The formula ip = [(un Cox) ) (Vgs - Vo)] vos a. What are the two main variables? b. If the channel length is doubled, what happens to ip ? C. If the channel width is doubled, what happens to ip? d. If the overdrive voltage is doubled, what happens to ip? 2. Describe in your own words what happens: (I want to know what is happening to the channel, the current through channel) a. Prior to pinch off? b. During pinch off?

Answer 1

O id = Hn Cox (VGS-VE) VOS L 0 VGs and Vds are main variables by changing Them wecan contref the operation of mos it channel length is doubled the is becomes half of original value 20. = Luncox w [vas-Ve] Vos eit width becomes doubled then po becomes . double pe = 2 uncex co [vas-vt]vos it derdrive Voltage i doubled the lip dabled over drive Voltage VGS-VE) ID = 2 Mncoreo [V&s=vEJ VOS © @ ② @ channel prior to pinch off there is no channel length moclobetion effect. Vos <Vas-Vth Is current is in increasing nature. upto vos= VGs-rth Ip current is increases and becomes maximum at vas-Vth = Vos NSV th: > Vos

② Dusing pinchoff resto Channel channe during pinchoff Vos= VES-Vth so there is no Voltage at the pinchoff so there og no. charge q= CV =) AVGS-Vih) = 0 but current Is has already saturates so it will flow constantly because of electric field it we increase Vos then channel lengih will decrease Vas-Vth will move lebrwardi but I current will remains same