EEVblog Electronics Community Forum
Electronics => Projects, Designs, and Technical Stuff => Topic started by: ezalys on March 22, 2022, 07:54:23 pm
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I'm interested in generating variable voltage pulses into 50 ohms, and I want the circuit to be back-matched. For this I'm thinking of using a half-bridge. I'm particularly concerned about edge timing... I really need as fast as an edge as I can get, and for that the switching edges of the FETs will overlap and briefly shoot through. I was thinking of killing two birds with one stone and using the same resistors for back-matching as shoot-through current limiting. Will the attached circuit look matched? Assuming the shoot through period constitutes an acceptable instantaneous power for the resistors and the duty cycle for the shoot through period times the instantaneous power is within the specs of the resistor -- will this provide a matched source? I expect this should deliver a pulse of voltage +V/2 into a 50 ohm load.