Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  • Users: ultrasoundguy2
  • Content: Threads
  • Order by date
  1. ultrasoundguy2

    current limiting

    I am using a diode to bias a BJT in order to regulate voltage to a load. See attached image (top) This top circuit in the attached figure works well and this concept of diode regulation cant be changed. The problem is that if the load fails as an open circuit, all the current is forced through...
  2. ultrasoundguy2

    interpolating in time domain to improve FFT frequency resolution

    Im trying to interpolate time domain data to improve the FFT resolution. Im not sure what Im doing wrong but Im getting a larger amount of bins but not decreasing the frequency spacing between the bins. I think Im doing something wrong or otherwise have made a mistake in theory. It should be...
  3. ultrasoundguy2

    50 ohm cable modeling

    id like to model a long 50 ohm cable in orcad layout There is a module called 'tlossy' for transmission line modeling. Tlossy seems to work under fixed conditions.. However, Id like to have the power supply on one side of the cable. Then on the other side, a load. The low side of the load is...
  4. ultrasoundguy2

    distortion in 1MHz power OP AMP

    hi all. really struggling with an issue Im having with a power op amp. We are getting a distortion in the output waveform, a copy of it is below http://files.engineering.com/getfile.aspx?folder=34a5a1e3-f22d-46a6-81ca-1556ef06161e&file=distrotedwaveformj.jpg we are driving a capacitive load...
  5. ultrasoundguy2

    orcad layout - convergence

    I would like to add a multiplication element to an orcad capture simulation.k ideally any frequency mixer IC model could be better than this element.. i can put in two DC signals and get a proper scaled output however, i get convergence problems when I stimulate it with an AC signal Ill...
  6. ultrasoundguy2

    supression of back EMF from ups

    Ive need to isolate wall voltage (powered from small generator) from a EMF generated by a UPS. It is a large UPS, it is powering a power supply rated for 1560 of which is supplying about 300V and 0.5A to an instrument. From what I understand, most commercial UPS have a back EMF which is normally...
  7. ultrasoundguy2

    strain gauge out of a mile long wire

    hello say I have a coax wire about a mile long that is subject to strains of 1% of the total length. This particular wire has a resistivity of about 4 ohms per 200ft. Is there a way to make a strain measurements out of this?. if could do a bridge into a differential amplifier if needed. what...
  8. ultrasoundguy2

    3 series shunt regulators

    I am making a long cable with many shunt regulators, only 3 of which are shown in the attached figure. The shunt regulators help prevent the whole cable from working if there is a failure. The long cable is similar to Christmas light scenario where if one load or shunt regulator diode may go...

Part and Inventory Search

Back
Top