1. S

    Can Impedance change be affected by capacitors for ESD protection?

    I put the 1nF capacitor for ESD protection in the LIN interface node. After testing 6kV, impedance deterioration before and after was measured in the measurements. Does this mean that insufficient capacitance values are likely to be applied?
  2. P

    Impedance Calculation

    Hmmmm?.... Is ChatGPT correct here? If a series circuit containing a capacitor, inductor and resistor is driven at a known fixed frequency, then is the Impedance calculation as simple as Z=R+Xl-Xc? Why is the impedance triangle not necessary?
  3. D

    Digital Multimeter Input Impedance

    Hello, I was just looking at my Fluke 179 DMM manual and I came across the following nominal input impedance for Volts ac. >10Mohm < 100 pF I would like to check my understanding, but I'm assuming the < 100 pF is related to the capacitive reactance at some frequency, however it will not be...
  4. E

    Attempted Antenna input impedance calculation

    I am attempting to calculate an antenna's input impedance. I have been given this information: A 50 Ω coaxial line is feeding an antenna with a signal frequency of 150 MHz. The coaxial line has a dielectric constant of 2.25, with an outer conductor of 40 mm. The antenna and coaxial cable are...
  5. F

    Online Coil Inductance Calculators yeild different Results

    Subject: Online Coil Inductance Calculators yeild different Results Designing an open air coil wound on PVC pipe with the following specs ... Wire = 12 gauged insulated electrical wire from Lowes - Wire Diameter = .125 including the insulation - Turns per inch = 8 - Total Turns = 212 - Coil...
  6. U

    Meaning of System Impedance value for air-conditioner? Is it safe to plug new in?

    Bought an air-conditioner on-line. Manual states that "system impedance must not exceed 0.389 ohms". Concerned that as our rented house has solar/mains mixed supply this may burn out again. We can tell from the light in the kitchen that our supply voltage fluctuates frequently. Sometimes the...
  7. cikalekli

    Input & Output Impedances of Common Emitter BJT Amplifier

    I want to study about "finding Input & Output Impedances of Common Emitter BJT Amplifier" However, I could not find a decent source & document about it. Could someone supply me with some documents for that. Then that would be gorgeous for my study. Thanks :)
  8. cikalekli

    Input and Output Impedance of the Common Emitter Amplifier

    Hi, I just have solved one of the bjt common emitter question below. However, I'm curious that how can I additionally find those things below: 1) Input and Output Impedance 2) AC Gain Here is the example and my hand draw solution. However, the question only asked to find Vout/Vin... Also, my...
  9. W

    Final Project - Bioimpedance Spectroscopy | Finding the right development kit

    Hello, My name is Daniel and I'm a student for E&E. I started a final project about bioimpedance spectroscopy using electrodes. I found this kit - Spectra Bioimpedance and EIT Complete Kit – Mindseye Biomedical and got one. Sadly, the DFT sample rate is way too slow to achieve a smooth image...
  10. Prajeet Anand

    Battery impedance measurement

    For the past few days I have been trying to buy a proper battery impedance measurement device that is good and also falls under my budget of 1000 dollars. I will be mostly using it to test 3.7V Lithium ion batteries. Could anyone suggest a good measurement device for that
  11. wazev

    Impedance

    If you have a common circuit with 1 resistor, 1 capacitor, and 1 inductor. Inousoidal voltage and current is applied with angular frequency, ω. Then you want to use the jω-method and express the total complex Impedance, Z, of the above circuit in terms of R,L,C and ω. Answer in the form Z = a +...
  12. Lambo Av

    Voltage Magnitude, Phases, Current for Bus (Load Flow)

    Say there are 3 buses of: Bus 1: Slack bus with a voltage source of E=1.0 and phase of 0° Bus 2: a generator and a load. Bus 3: a load. The line impedance are given below: z12 = 0.05 + j0.1 z13 = 0.02 + j0.05 z23 = j0.05 z11 = -j100 z22 = infinity z33 = -j40 The generators and loads are given...
  13. Lambo Av

    Given 3 buses with line impedance, generators and loads provided, where must the protection circuit be allocated?

    The 3 buses are Bus 1: Slack bus with a voltage source of E=1.0 and phase of 0° Bus 2: a generator and a load. Bus 3: a load. The line impedance are given below: z12 = 0.05 + j0.1 z13 = 0.02 + j0.05 z23 = j0.05 z11 = -j100 z22 = infinity z33 = -j40 The generators and loads are given below...
  14. E

    How to change trace width and spacing of diff pairs in the design using MentorGraphics Hyperlynx SI

    Hi, I am simulating my postgraduate project using Hyperlynx SI tool. I am testing on PCIe traces of my design. I did my design using Altium and I exported to Hyperlynx file to do the simulation. But I cannot change the trace width and spacing of Differential pairs using Hyperlynx SI tool. Is...
  15. C

    Calculation of power factor in a RLC-circuit

    Hello, I got a homework exercise about the calculation of the power factor in a RL-circuit and in a RLC-circuit. The question consists of 3 sub questions, I have managed to calculate the first 2 however I am struggling with the third one. For the calculation of the third question, the other 2...
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