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This circuit generates a fast 1ns pulse with 350ps rise and fall times using an avalanche transistor. A switching regulator converts a 1.5V battery input to the 90V required for avalanche. When a capacitor charges enough, the transistor avalanches, producing a quickly rising pulse. Oscillation occurs at 200kHz. When tested on a sampling oscilloscope, rise and fall times were measured as fast as 216ps and 232ps. Careful layout is required to achieve the fast switching speeds. The complete packaged unit consi

Author
barbosi
Language
EN

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