Recent content by jean28

  1. J

    Where does this voltage come from?

    I am assuming it is 0.7 V because that is the Vbe when the BJT is active, but could you give a brief the process of how to analyze this circuit?
  2. J

    Where does this voltage come from?

    Hello guys, I had a quick question about one of the exercises of my electronics book. Step #1 says that I should do: (5 - 0.7)/(10 + 101 * 1) = 0.039 mA However, I can't seem to find where the 0.7V comes from. I simulated the circuit in Multisim and i'm measuring the voltages everywhere...
  3. J

    Simple program in assembly using Tiva C launchpad?

    Hey guys! I just got a new Tiva C MCU. It's architecture is ARM, and I have no experience programming in assembly using said architecture. To start, I'm trying to run a simple program that puts a value in a register. In an MSP430, the project I'm trying to do would look something like this...
  4. J

    Are these courses worth it?

    Hey guys, I'm an undergrad in computer engineering. This past summer I worked as a research assistant in the robotics GRASP Lab at the University of Pennsylvania. This experience with robots has driven an interest in me in Control Systems (a class that computer engineers don't usually take)...
  5. J

    Benefits of learning about networking?

    Hey guys! I'm taking a course this semester on Networking Fundamentals. Our professor has given us the opportunity to be able to take tests by Cisco to become CCNA certified for free. I don't know much about networking yet, so I was wondering how much of a big deal it is to be a CCNA...
  6. J

    Simple Seven Segment Counter Project Help?

    Hello Guys, I am trying to do a simple digital electronics project where I put two seven segment displays and once I connect the voltage source, the displays start counting automatically from 00 to 99. Here is a video of exactly what I want to do: My group and I found the attached...
  7. J

    Simulating a NAND/AND gate in Emitter Coupled Logic?

    Homework Statement I need to simulate a AND/NAND gate with Emitter Coupled Logic. As i'm sure that most of you know, ECL is mostly used to make OR/NOR gates, so finding out how to make a NAND/AND gate is not as easy as it sounds. Homework Equations The Attempt at a Solution I...
  8. J

    Voltage Transfer Characteristic in Multisim?

    Homework Statement Hey guys. I am trying to calculate the Voltage Transfer Characteristic (VTC i.e. Vout vs. Vin) of a simulated circuit in Multisim but for some reason it doesn't appear to be working. I pressed Simulate --> Analyses ---> DC Sweep --> Selected the input pulsed voltage as...
  9. J

    Value of Vout in PMOS Inverter?

    It could also be Vout = id * Rd.
  10. J

    Value of Vout in PMOS Inverter?

    Hey guys. I am simply trying to derive the equation for Vout in a PMOS inverter (attached). I know that in an NMOS inverter (which has the resistor in top of the transistor instead of the bottom) the equation for Vout is: Vdd - id*rd. But how does the resistor being in the bottom change...
  11. J

    How to design an XOR with these gates?

    I need to design an XOR with 2 NANDS, 1 NOR, and 3 inverters. Is it possible? I can't seem to find how to do it now.
  12. J

    Designing an XOR gate

    Homework Statement Design a 2-input XOR with the following specifications: RL = 1KΩ VDD = 1.8V VOL = 0.1V VOH = 1.7V Homework Equations Triode: Id = μnCox W/L VDS (VGS - Vt - VDS/2) Cutoff: Id = 0. The Attempt at a Solution Searching on my book I found the image...
  13. J

    Good PDF Merger program or site?

    Hey guys. I need to merge about 7 PDF's but a few of them are about 80MB in size. I've tried a few good PDF pages from around the web but they all seem to have about 50MB in limit. Could anyone suggest me a good program that has no limitations to size of PDF's? Preferably free but if not...