EE114_HW3 - EE114 Autumn 08/09 R Dutton B Murmann Page 1 of...

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

View Full Document Right Arrow Icon
EE114 Autumn 08/09 R. Dutton, B. Murmann Page 1 of 2 Last modified 10/10/2008 11:43:00 AM HOMEWORK #3 (Due: Friday, October 17, 2008, noon PT) 1. Consider the circuit on slides 19/20 of lecture 6. With λ = 0.1 V -1 , the quiescent point output voltage (V O ) is set exactly at 2.5V. Compute V O for the two cases when λ changes by +50% and -50%, respectively. As mentioned in class, such discrepancies may be due to variations in the semiconductor process or simply due to uncertainty in the simplistic model used to incorporate finite dI D /dV ds . 2. Assume that you have just joined a new company and that their technology and technology files for SPICE are quite different from what you have worked with at your previous company. Hence, you need to do some hand calculations and related SPICE simulations to confirm what you can expect with the technology at hand. Here is how you will go about the task: a) Assume a W=30 μ m and L=1.6 μ m NMOS device, with KP=50 μ A/V 2 , VTO=0.5V and COX=2.3mF/m 2 (using the Lambda scaling rule given in Lect. 5, p. 18); for a bias current of 0.25mA and assumed Vds=2.5V, compute (by hand) the required Vgs and resulting Cgs and small-signal gm and gds (ignoring all extrinsic capacitances). b) Construct an HSPICE deck, similar to that shown in Lect. 6, p. 21 but only to be used for the dc operating point and “.op” output. This time use R=5K Ω and R i =10K Ω .
Image of page 1

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

View Full Document Right Arrow Icon
Image of page 2
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