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 MintJulep 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: Henneshoe
  • Content: Threads
  • Order by date
  1. Henneshoe

    Flyback Converter Primary to Secondary Capacitor

    Hi All, I am looking for a sanity check here. (And maybe a lesson in SMPS design.) I have a Flyback converter that was generating a lot of RF emissions. We placed a 4.7nF/500V capacitor between the primary and secondary windings and it greatly reduced the RF emissions (-15dB). I am a little...
  2. Henneshoe

    Common Mode Voltage of Thermocouple Input

    I am specifying a 4 channel thermocouple device, and I am not sure what my requirements are for common mode range. I found some devices where each thermocouple is galvanicly isolated, so there is 500V common mode range. There are also devices where the thermocouples are not individually...
  3. Henneshoe

    Directional Antenna for Detecting Radiated EM Emissions

    I am testing a design for a device with a built in Ethernet switch for CE certification. We failed the EM Emissions portion of the test due to noise spikes at 125, 250, and 375 MHz. I immediately suspected the Ethernet communication because the actual clock rate of 100Mbit/s Ethernet is...
  4. Henneshoe

    Annoying Patent Websites

    This morning I did a Google search on voltage translation and the first 2 pages were patent websites. As far as I am concerned these sites are of no value, and really annoying. However, they must be pretty good at search engine optimization. Has anyone else noticed the increase in these...
  5. Henneshoe

    DC-DC converter with multiple outputs

    I am designing a DC-DC converter that will have a 24V input and outputs of +/- 15V, 5V and 3.3V (~1A for 15V, .5A for 5V and 3.3V). I was thinking of using something like a flyback converter (I think) where a MC33063 would be used to drive a transformer primary with two secondarys. The first...

Part and Inventory Search

Back
Top