lab 4 2009 other diode circuits

# lab 4 2009 other diode circuits - LAB 3 OTHER DIODE...

This preview shows pages 1–2. Sign up to view the full content.

L AB 3: O THER D IODE C IRCUITS I Purpose The purpose of this laboratory is to investigate a number of useful diode circuits that can be understood from the analysis of diode circuits presented in class. In particular, you will: 1. investigate the diode limiter which can prevent the input of a circuit to exceed a preset limit; 2. build a voltage doubler, an example of circuit which can be used to generate high magnitude dc voltages from low amplitude ac voltages; 3. build and analyze experimentally a peak voltage detector. In the last part of this lab, you will use the operational amplifier that you studied in EE 202. Recall that the op-amp has two inputs V in+ and V in- and one output V out . The op-amp is powered with a split supply typically V cc /-V cc = +/- 15 V. In the op-amp, the input voltages have very high impedance such that the currents flowing in or out of the op-amp inputs are near 0. When the op-amp is used “open-loop”, that is without connection between the output and the inputs, if V in+ > V in- , V out = V cc . Conversely, if V in+ < V in- , V out = -V cc . When the op-amp is used with negative feedback, that is with a current path between the output and the inverting input, the op-amp adjusts its output voltage to make the voltages at its two inputs equal to each other. 4 -V c c V in + 3 5 6 V in - 2 1 7 8 V in + V o u t -V c c V in - + V c c + V c c V o u t II Diode Limiter Prelab: . 1. Read section 2-4 in Floyd, pp. 65 – 70. Answer questions 16 and 17, page 96. 2. Consider the circuit A on the left in the diagram below, what is the ouput voltage V out when V in is 0.5V, -0.5 V, 2 V, -2 V? (Use the practical diode model.) 3.

This preview has intentionally blurred sections. Sign up to view the full version.

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

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern