Numerical Value - Microelectronic Devices and Circuits - Exam, Exams of Microelectronic Circuits

Download Numerical Value - Microelectronic Devices and Circuits - Exam and more Exams Microelectronic Circuits in PDF only on Docsity! EE 105: Fall 1997 Midterm 2 University of California at Berkeley College of Engineering Department of Electrical Engineering and Computer Sciences R.T. Howe, Fall 1997 EECS 105 Midterm 2: November 19, 1997 · Closed book and notes; one 8.5" X 11 "formula sheet (both sides) · Do all work on exam pages · You have 80 minutes; use your time wisely! · Default BJT parameters: npn: Βo = 100, VAn = 0.7 V, VCE,sat = 0.2 V · Default MOSFET parameters: note that λ depends on L! NMOS: •nCox = 50 •AV-2, λn = [0.1/L]V-1 (Lin •m) VTn = 1 V PMOS: •pCox = 25 •AV-2, λp = [0.1/L]V-1 (Lin •m) VTp = -1 V 1. BiCMOS Voltage Amplifier [19 points] (a) [3 pts.] What is the numerical value of the DC voltage VG2 at the stage of the transistor M2, given that the DC output voltage Vout = 0 V? Note that VSG2 is given. file:///U|/test/fa-2.html (1 of 5) [4/25/2003 1:35:45 PM] EE 105: Fall 1997 Midterm 2 (b) [3 pts.] Find the width of the transistor M1 in •m such that -ID1 = ISUP1 = 250 •A, with M1 operating in the constant-current region (MOSFET saturation). Neglect channel- length modulation for this DC Hand-calculation. (c) [3 pts.] Draw the two port models for each stage of this three stage voltage amplifier. You do not need to evaluate parameters of the models. (d) [5 pts.] Find the numerical value of the output resistance Rout of this amplifier. Your answer need only be correct to within ±5% for full credit. (e) [5 pts.] Find the numerical value of the voltage gain Av (Rs = 0 Ω, RL = ∞ Ω). If you If you couldn't answer part (b), you can assume for this part that W1 = 100 •m. Your answer need only be correct to within ±5% for full credit. 2. Dynamic Logic Gate [15 points] file:///U|/test/fa-2.html (2 of 5) [4/25/2003 1:35:45 PM]