303S12hmwrk3 - results. a) With parameterized Rin for 100...

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

View Full Document Right Arrow Icon
File: f:/coursesS12/303/303S12hmwk3.doc RWN 02/12/12 303 Spring 2012– Homework 3 Due M 02/20/12 in class 1. (40 points, BJT curves) a) For the following circuit run curves for IC versus VCC with 0 IB 40 uA in 10uA steps. b) If the Q points are at VCEnpn=3=-VCEpnp and |IC|=3mA, give the g m ’s g π ’s and g o ’s for both the npn and the pnp Qnpn Q2N3904 Qpnp Q2N3906 0 VCC 6Vdc IB 10uAdc CC Fn F GAIN = -1 Bn mid Fp F GAIN = 1 Bp in 2. (60 points, Current Mirrors) In the following circuit from Homework 2 replace the transistors by BJTs (2n3904 & 2n3906). Use PSpice DC runs varying Vdd near 5V to obtain the desired
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: results. a) With parameterized Rin for 100 Rpar 100K in logarithmic steps, 1 curve per step, determine the resulting currents into all the transistors. Show the ICns in one plot and the ICps in another) b) Over the same range of Rin determine the voltages at in, mid, and out c) Since the currents are supposed to be equal, explain why they are not. Rin {Rpar} Vss-5Vdc Vdd 5Vdc Mp1 M4007P ss dd in mid out PARAMETERS: Rpar = 1K Mn M4007N Mp2 M4007P Mn1 M4007N Mn3 M4007N...
View Full Document

This note was uploaded on 02/25/2012 for the course ENEE 303 taught by Professor Newcomb during the Spring '08 term at Maryland.

Ask a homework question - tutors are online