I am sure I have experienced parasitic osc, but never identified it in practice before. As for passing EMI I have experienced issues in passing Class B. Class A designed that I worked on require only an addition of ferrite ring on cabling inside the unit.
Hi all -Audio is live! If you don't see the audio bar at the top of the screen, please refresh your browser. It may take a couple tries. When you see the audio bar, hit the play button. If you experience audio interruptions and are using IE, try using FF or Chrome as your browser. Many people experience issues with IE. Also, make sure your flash player is updated with the current version. Some companies block live audio streams, so if that is the case for your company, the class will be archived on this page immediately following the class and you can listen then. People don't experience any issues with the audio for the archived version.
On Tuesday someone asked about the Vds available for fet. Digikey has a fet selector chart that lists 4500 v for a small number of products. Is there anything to keep in mind when using these high voltages like isolation of the gate driver or keeping these voltages separate and or floating?
-The streaming audio player will appear on this web page when the show starts at 2 PM Eastern time today. Note however that some companies block live audio streams. If when the show starts you don't hear any audio, try refreshing your browser. If that doesn't work, try using Firefox or Google Chrome as your browser. Some users experience audio interruptions with IE. If that doesn't work, the class will be archived immediately following our live taping.
One concept I have seen that prevents overlap shoot-through is to use a triangle wave to trigger the forward and reverse pair of FETs. A DC offset is increased to move more of the triangle above the trigger voltage of the Forward FETs, thus increasing the duty cycle. The triangle wave is moved downward by lowering the DC offset and moving more of the triangle into the Reverse FETs. The difference in Forward and Reverse trigger voltages is greater than the P-P voltage of the triangle wave, thus the waveform can never trigger both pairs of FETs at once. Any other schemes to share?
Using wireless chips and accessories, engineers can now extract data from the unlikeliest of places -- pumps, motors, bridges, conveyors, refineries, cooling towers, parking garages, down-hole drills and just about anything else that can benefit from monitoring.
With strong marketplace demand for qualified engineers across the board that currently outstrips the available supply, there may never be a better time for engineers and project managers to advance their careers and salaries. Whether those moves are successful in the short-term and long-term is likely to depend on how the transition from one job to the next is handled.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.