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Q&A Technique to reset pulse transformer core quickly

Is there any way to reset a core quickly without having ground / reference terminal pulled towards negative voltage Unfortunately not but, if instead of trying to send the complete pulse throu...

posted 2y ago by Andy aka‭  ·  edited 2y ago by Andy aka‭

Answer
#3: Post edited by user avatar Andy aka‭ · 2022-09-03T10:34:27Z (over 2 years ago)
  • > _Is there any way to reset a core quickly without having ground / reference terminal pulled towards negative voltage_
  • Unfortunately not but, if instead of trying to send the complete pulse through the transformer, you send edge information (i.e. use a series capacitor to perform a kind of differentiation), then you can adequately reconstruct the secondary voltage using a comparator with hysteresis. Here's what the output waveform would look like: -
  • ![Image alt text](https://electrical.codidact.com/uploads/uUMziJHeUdphq5jjSwqPxmAV)
  • And, feeding the output voltage to a comparator with hysteresis, will reconstruct your data pulse.
  • > _Is there any way to reset a core quickly without having ground / reference terminal pulled towards negative voltage_
  • Unfortunately not but, if instead of trying to send the complete pulse through the transformer, you send edge information (i.e. use a series capacitor to perform a kind of differentiation), then you can adequately reconstruct the secondary voltage using a comparator with hysteresis. Here's what the output waveform would look like: -
  • ![Image alt text](https://electrical.codidact.com/uploads/uUMziJHeUdphq5jjSwqPxmAV)
  • Below I've shown where you could set the upper and lower threshold limits for the comparator with hysteresis: -
  • ![Image alt text](https://electrical.codidact.com/uploads/ucTTym2wRzkUGTf1FEoDZaBB)
#2: Post edited by user avatar Andy aka‭ · 2022-09-02T12:08:17Z (over 2 years ago)
  • > _Is there any way to reset a core quickly without having ground / reference terminal pulled towards negative voltage_
  • Unfortunately not but, if instead of trying to send the complete pulse through the transformer, you send edge information (i.e. use a series capacitor to perform a kind of differentiation), then you can adequately reconstruct the secondary voltage using a comparator with hysteresis. Here's what the output waveform would look like: -
  • ![Image alt text](https://electrical.codidact.com/uploads/tkeUqWj5kWj1CkpD3yVbabnR)
  • And, feeding the output voltage to a comparator with hysteresis, will reconstruct your data pulse.
  • > _Is there any way to reset a core quickly without having ground / reference terminal pulled towards negative voltage_
  • Unfortunately not but, if instead of trying to send the complete pulse through the transformer, you send edge information (i.e. use a series capacitor to perform a kind of differentiation), then you can adequately reconstruct the secondary voltage using a comparator with hysteresis. Here's what the output waveform would look like: -
  • ![Image alt text](https://electrical.codidact.com/uploads/uUMziJHeUdphq5jjSwqPxmAV)
  • And, feeding the output voltage to a comparator with hysteresis, will reconstruct your data pulse.
#1: Initial revision by user avatar Andy aka‭ · 2022-09-02T12:07:05Z (over 2 years ago)
 > _Is there any way to reset a core quickly without having ground / reference terminal pulled towards negative voltage_ 

Unfortunately not but, if instead of trying to send the complete pulse through the transformer, you send edge information (i.e. use a series capacitor to perform a kind of differentiation), then you can adequately reconstruct the secondary voltage using a comparator with hysteresis. Here's what the output waveform would look like: -

![Image alt text](https://electrical.codidact.com/uploads/tkeUqWj5kWj1CkpD3yVbabnR)

And, feeding the output voltage to a comparator with hysteresis, will reconstruct your data pulse.