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Forum: Analog Circuits Bootstrap-circuit


Author: Alex A. (Company: Andi&Alex) (alextbg)
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Hello there,
can anyone tell me how the bootstrap circuit works? I already googeled 
it, but i haven't found anything useful. Thanks for your help!

: Moved by Moderator
Author: Kaktusbombe (Guest)
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A bootstrap circuit is a kind of charge pump. I know bootstrap circuits 
from audio amps and mosfet drivers. It is basically a capacitor 
connected from the output of the driver to the positive supply rail 
(after a diode). This enhances the output voltage swing in that way that 
the circuit can drive a N-channel mosfet in the pull-up part of the 
output driver.

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