HW6 - HW6 PHYSICS 127A 2010 1(a You are measuring with a...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
V s R s = 10k Experiment 50 V o-scope V s 20k 10V in 50 V in R s = 10k Experiment 50 V o-scope (a) (b) 1. (a) You are measuring with a high-speed oscilloscope (with 50 input resistance) an experiment with a Vs = 1 mV voltage source and a 10 k source impedance. What is the voltage measured by the o-scope? Why is the voltage so small? (b) You now connect an amplifier between the experiment and o-scope. The amplifier has a gain of 10 , Rin = 20 k , and Rout = 50 . What is the voltage then measured by the o-scope? HW6, PHYSICS 127A 2010
Image of page 1

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

View Full Document Right Arrow Icon
+10 V -1.6 V Vout Vin 1k 3. Emitter followers are supposed to have a gain of 1. In this problem, let’s calculate how close to 1 the gain really is. (a) Show that the gain of the following circuit is 0.99, assuming β = 100. (b) Now show the gain drops to 0.966 when you include the effect of the emitter resistor r e (in series with the base-emitter diode in the transistor). (c) What happens to the gain if you drop the lower voltage to -2.6 V?
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    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.

    Student Picture

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

  • Left Quote Icon

    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.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    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.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern