2 Problem 2 Use: ()()()( )20053421====LWLWLWLW Vt=1V kn’=40µA/V2 λ1,2,3,4=0 VD0=0.6 n=1 VT=25mV ignore VA VBE=0.7 β=150 Vin=8+1msinωt 1. Find the following DC values: (a) IDIODE (b) VG3 (c) Vo1 (d) Vout 2. Draw the AC small-signal circuit 3. Find the AC values: (a) Find Rin. (b) Find Rout. (c) Find the overall gain, Vo/VIN. State value as a numeric value. 4. What is the maximum value that the resistor RC = 4k at the collector of transistor Q5 be changed to and still keep the transistor active? Explain in detail how this resistor changes the overall gain? Rin + - IDIODE Vout VIN Vo1 +9V VG3 Rout 1Meg +9V +9V +9V +9V -9V -9V 1.7k 1.7k Q5 Final Practice3 Problem 3 Use: Vt=1V kn’=30µA/V2 λ=0 ()()()( )100104321====LWLWLWLW VD0=0.6 n=2 VT=25mV ignore VA VBE=0.7 β=150 Vin=5+2msinωt 1. Find the following DC values: (e) IDIODE (f) VG4 (g) Vo1 (h) Vout 2. Draw the AC small- signal circuit 3. Find the AC parameters: (a) rπ (b) gm for transistor Q4 (c) gm for transistor Q5 (d) rd for the diodes 4. Find the values for Rin and Rout. 5. Find the gain: ()INoVV1 6. Find the gain: ()INoutVV 7. Find the total instantaneous output voltage Vout. Draw the input, VI, and the total output (DC and AC) on the same graph vs time for 2 periods. Mark the maximum and minimum peak values. 8. What is the maximum value that the resistor RC=1k at the collector of transistor Q5 be changed to and still keep the transistor in saturation? Explain in detail how this resistor changes the overall gain? Rin + - IDIODE Vout VIN Vo1 +9V +9V VG4 Rout 5.2k +9V +9V -9V -9V4 Problem 4 Solve the circuit when n=1, VT=25mV, Vt=+1V, k’(W/L)=2mA/V2, β=100, ignore VA, λ=0, VBE=0.7V a. DC Values: i. IB1, IC1, IE1 ii. ID2, IG2, IS2 iii. IB3, IC3, IE3 iv. VB1, VE1, VC1 v. VG2, VS2, VD2 vi. VB3, VE3, VC3 b. AC Values: i. Rin (do not include 100k) ii. Rout (do not include RL) iii. Gain: