set05new - ECE3050 Homework Set 5 1. For K = 1.78 mA/ V2 ,...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ECE3050 Homework Set 5 1. For K = 1.78 mA/ V2 , VT O = 1.5 V, V + = 18 V, R1 = 110 kΩ, R2 = 68 kΩ, RD = 0, and RS = 1 kΩ, write the bias equation, solve for ID , and verify that the MOSFET is biased in the saturation region, i.e. its active mode. [ID = 3.897 mA, VDS = 14.10 V, VGS − VT O = 1.480 V] 2. Add a resistor R3 from gate to source for the circuit in problem 1. (a) Show that VGG = V + R2 k (R3 + RS ) RS + IS × R1 kR2 R1 + R2 k (R3 + RS ) RS + R3 + R1 kR2 RGG = R1 kR2 k (R3 + RS ) VSS = R2 V+ × × RS R1 + R2 k (R3 + RS ) R2 + R3 + RS RSS = (R1 kR2 k + R3 ) kRS (b) For R3 = 20 kΩ, write the bias equation, solve for ID , and verify that the MOSFET is biased in the saturation region. [ID = 0.492 mA, VDS = 17.41 V, VGS − VT O = 0.526 V] 3. Add a resistor R4 from drain to source for the circuit in problem 1. Show that VSS = V + RS RD − ID RS RD + R4 + RS RD + R4 + RS RSS = RS k (R4 + RD ) VDD = V + R4 + RS RS + IS RD RD + R4 + RS RD + R4 + RS RDD = RD k (R4 + RS ) 1 ...
View Full Document

This note was uploaded on 05/25/2011 for the course ECE 3050 taught by Professor Hollis during the Summer '08 term at Georgia Tech.

Ask a homework question - tutors are online