Question

amplifir final Peper-ECO (1) Q1. A discrete MOSFET Common-source has Rin=4m2, gm=&mit, vo= 150 kn, RD=20kr Cgsa upf and Cga = aff. The amplifier is het voltage source with an internal resistance of loooker and is connected to a zokn lood. from a find @ the overall midband gain AM fr the upper 3-dB frequency Marks: 10 (ase/Pod / (4) 1 Add file Back Next PE o

Answer 1

Solution - page A discrete MOSFET Common Source amplificar has Rin 1000 KR RG ЧML Im = 8 malu 150 kr 20 К.). Rp = Cgo 1) 4 PF Cga 1 PE and RL 20KR a) The Formula for midband gain is AM Rix RGt Rin - gm RG calculation of R: RE ( Yol R0||RL] [ski ܐܢ ܐ ܐܘ ܙܲܝܬ ܀ ܗ - 150 + 150 20 20 RI 9.375 kr

Page ① calculation of Im Rei 9m R' = 8x16² x 9.375 x103 75 V/V Thus we get Imre = 75 v/v find the midband gain RG AM Im Rex RGtrin Now - 75 x 4xroo (4x16) +(000x133) AM - 75 x 0.8 AM -60 So, we get the mid band gain Am -60 b) calculation an of Rin Rin Rinllra (ooo Kallu 4 Mr 1000 kr ЧМл

Page 3 Rin = sooks calculation of cini Cin = 4x10 -12 Cast Cgd (it Impe) + 1x10? (1475) Cut 4+ 76) 12 100 gO xlo -12 Cin 80 PF Calculation of fiti fx = 2K Cin Rin - -12 25x80x10 x 800 x103 شهے = 2.486 KHZ Thos we get 1/4 = 2,486 kHz