| Electronics > Projects, Designs, and Technical Stuff |
| clipping a fast negative pulse |
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| brumbarchris:
So I have to deal with a big and fast negative pulse, as in the attached picture. The requirement is to reliably and as accurately as possible (nice spec, right?) clip or clamp this pulse to a fixed voltage level (does not need to be adjustable) between -0.8V and -1.4V across temperature (-20C to 60C) and across the parameter variations that the components employed would have. What are your suggestions? Best regards, Cristian |
| OwO:
Source impedance? is adding another series resistor acceptable? |
| brumbarchris:
This pulse is coming off of a ~2mH coil which has some 10Ohm DC resistance, when supply current is suddenly cut. We also have a 1k damping resistor in parallel with the coil. |
| dzseki:
Usualy a diode is used for such application. |
| AndyC_772:
Do you mean it needs to be clamped to a fixed, accurately controlled, known level (which happens to be between those limits)? Or, is the requirement simply to keep the voltage within those limits in order to not damage something? If it's the latter, then a fast silicon diode to GND may be all you need. If it's the former, you'll need something much more involved and complex. |
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