Experiment 4 - Basic Output Stage Circuits | EE 100B, Lab Reports of Electrical and Electronics Engineering

Download Experiment 4 - Basic Output Stage Circuits | EE 100B and more Lab Reports Electrical and Electronics Engineering in PDF only on Docsity! 1 EE100B Experiment 4 Basic Output-Stage Circuits College of Engineering University of California, Riverside Objective To familiarize with basic output-stage topologies. Class-A and Class-B examples will be explored. Equipment 2 non BJTs (2N2222), 1 pnp BJT (2N3906), 1 diode (1N914), resistors (100Ω, 1kΩ, 10kΩ), function generator, oscilloscope, digital multimeter, DC power supply, breadboard 2N2222 npn transistor 2N3906 pnp transistor Figure L4.1 BJT Base Diagrams 2 Prelab Read the sections of your textbook relevant to this laboratory session. The Class-A Follower 1. DC Bias For the circuit shown in Figure L4.2, assuming that D1 and Q2 are matched, what current flows into the emitter of Q1, assuming that β is very high? If R2 is changed to a 1kΩ resistor, what will IE1 become? If β=100, what voltage drop occurs in R1? 2. Signal Operation For the circuit shown in Figure L4.2, what are the upper and lower limits of vB for a load of RL = 10kΩ, assuming that β is very high? Figure L4.2 A Class-A BJT Follower with Emitter-Current Bias +5V +5V -5V R5 100Ω R1 10kΩ R2 10kΩ R3 100Ω R4 100Ω RL Q1 Q2 D1 vo A B C D E F S