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Q&A Technique to reset pulse transformer core quickly

I am analysing a pulse transformer which is required to transfer below communication protocol pulse from primary to the secondary side. The pulse duration is 32 μs and off time available to reset t...

2 answers · posted 2y ago by kadamrohan16‭ · edited 1y ago by Lorenzo Donati‭

Question transformer communication pulse-transformer core-saturation

#3: Post edited by

Lorenzo Donati‭ · 2023-08-09T20:46:20Z (over 1 year ago)
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transformer pulse-transformer core-saturation

transformer communication pulse-transformer core-saturation

#2: Post edited by

Lorenzo Donati‭ · 2023-08-09T20:45:48Z (over 1 year ago)

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power-supply Analog transformer inductor

transformer pulse-transformer core-saturation

#1: Initial revision by

kadamrohan16‭ · 2022-09-02T11:34:41Z (over 2 years ago)

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Technique to reset pulse transformer core quickly

I am analysing a pulse transformer which is required to transfer below communication protocol pulse from primary to the secondary side. The pulse duration is 32 μs and off time available to reset the core is just 7 μs. Calculation shows that -22.85 V are required to reset the core within 7 μs.

For simulation, I have used 33 V Zener and 1N4148 blocking diode.

Is there any way to reset a core quickly without having ground / reference terminal pulled towards negative voltage ? because  when -22.85 V is applied across TTL logic pins like microcontroller,they will get damaged.

![communication pulse information](https://electrical.codidact.com/uploads/Mn4KHVTQRcqwqabKwCqG5oZ2)

![Ltspice simulation snapshot](https://electrical.codidact.com/uploads/pw6kaGHTzLG3MPR6uvwoyuui)

![Primary side Voltage waveform of transformer](https://electrical.codidact.com/uploads/5mtMcEAiTcURRJivKpicGdtZ)

power-supply Analog transformer inductor

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