Common gate connected high voltage transient blocking unit

Details Common gate connected high voltage transient blocking unit Common gate connected high voltage transient blocking unit

2011-07-05

2011-07-05

Jackson, Stephen W (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Transient responsive

Reexamination Certificate

active

07974061

ABSTRACT:
When a series protective element such as a transient blocking unit (TBU) is used in combination with a shunt protective element such as a gas discharge tube (GDT), firing of the GDT can cause a transient having the potential to damage the TBU. This problem can be alleviated by placing a TBU core in series between depletion mode transistors having their gates connected. With this arrangement, the GDT transient causes a transient in the TBU circuit that has the effect of switching the transistors around the TBU hard off, thereby protecting the TBU from the GDT transient.

REFERENCES:
patent: 5742463 (1998-04-01), Harris
patent: 6954347 (2005-10-01), Chaudhry
patent: 7324315 (2008-01-01), Harris
patent: 7576962 (2009-08-01), Harris
patent: 7616418 (2009-11-01), Harris
patent: 2005/0128669 (2005-06-01), Harris
patent: 2005/0180080 (2005-08-01), Harris
patent: 2006/0098363 (2006-05-01), Hebert et al.

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