Microelectronic Circuits Quiz 6 - ECE 3040, Quizzes of Electrical and Electronics Engineering

Download Microelectronic Circuits Quiz 6 - ECE 3040 and more Quizzes Electrical and Electronics Engineering in PDF only on Docsity! ECE 3040 Microelectronic Circuits Quiz 6, June 23, 2004 Professor Leach Name Instructions. Print your name in the space above. The quiz is closed-book and closed- notes. The quiz consists of 2 problems. Honor Code Statement: I have neither given nor received help on this quiz. Initials 1. A two stage MOSFET amplifier is shown. Each device has the parameters ID = 1.5mA, gm = 0.004 S, VDS = 10V, and r0 = 30 kΩ. The element values are R1 = 1kΩ, R2 = 3kΩ, RD1 = 36 kΩ, and RD2 = 12kΩ. (a) What is the type or configuration of each amplifier stage? Each stage is a common- source stage. (b) What is the input resistance seen looking into the vi node? rin = R1 +R2 = 4kΩ (c) What is vg1/vi? vg1 vi = R2 R1 +R2 = 0.75 (d) What is vd1/vg1? vd1 vg1 = −gm (r0kRD1) = −65.46 (e) What is vo/vd1? vo vd1 = −gm (r0kRD2) = −34.29 (f) Combine the above three answers to determine the value of vo/vi. vo vi = vg1 vi × vd1 vg1 × vo vd1 = +1684 (g) What is the output resistance seen looking into the vo node? rout = r0kRD2 = 8.57 kΩ 1