Low resistance transient blocking unit

Details Low resistance transient blocking unit Low resistance transient blocking unit

2006-01-12

2009-02-17

Sherry, Michael J (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

High voltage dissipation

C361S091100, C361S093800, C361S103000, C361S104000, C361S105000, C361S106000

Reexamination Certificate

active

07492566

ABSTRACT:
A transient blocking unit (TBU) having reduced series impedance is provided. A TBU includes two or more depletion mode transistors arranged to provide a low series impedance in normal operation and a high series impedance when the input current exceeds a predetermined threshold. A nonlinear impedance element is included in the TBU that acts as a current limiter having a substantially constant saturation current over a range of applied voltages. This saturation current is selected to be the threshold current of the TBU. When the threshold is exceeded, the voltage developed across the nonlinear impedance element tends to drive the TBU into its high impedance state. When the operating current is below threshold, the TBU series resistance is relatively low because the nonlinear impedance element is in its low-resistance state. The nonlinear impedance element can be a separate circuit element, or it can be integrated with one or more of the TBU transistors.

REFERENCES:
patent: 3916220 (1975-10-01), Roveti
patent: 4533970 (1985-08-01), Brown
patent: 4811156 (1989-03-01), Kroll
patent: 5130262 (1992-07-01), Masquelier et al.
patent: 5319515 (1994-06-01), Pryor et al.
patent: 5625519 (1997-04-01), Atkins
patent: 5696659 (1997-12-01), Maruo
patent: 5729418 (1998-03-01), Lei
patent: 5742463 (1998-04-01), Harris
patent: 5789900 (1998-08-01), Hasegawa et al.
patent: 5929665 (1999-07-01), Ichikawa et al.
patent: 6002566 (1999-12-01), Arikawa et al.
patent: 6118641 (2000-09-01), Atkins et al.
patent: 6157529 (2000-12-01), Ahuja
patent: 6313610 (2001-11-01), Korsunsky
patent: 6331763 (2001-12-01), Thomas et al.
patent: 6351360 (2002-02-01), Kotowski et al.
patent: 6518731 (2003-02-01), Thomas et al.
patent: 6714393 (2004-03-01), Nostrand
patent: 6768623 (2004-07-01), Shen
patent: 6855988 (2005-02-01), Madurawe
patent: 6861828 (2005-03-01), Watanabe
patent: 6865063 (2005-03-01), Ball
patent: 6914416 (2005-07-01), Thomas et al.
patent: 6948078 (2005-09-01), Odaohhara
patent: 6958591 (2005-10-01), Smith
patent: 6970337 (2005-11-01), Strahm
patent: A-75035/91 (1991-11-01), None
patent: 0818867 (1998-01-01), None
patent: 2294598 (1995-01-01), None
patent: WO95001667 (1995-01-01), None
patent: WO01001539 (2001-01-01), None
patent: WO03069753 (2003-08-01), None
patent: WO2004006408 (2004-01-01), None
patent: WO2004034544 (2004-04-01), None

Affiliated with

Also associated with

Rating

Low resistance transient blocking unit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Low resistance transient blocking unit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low resistance transient blocking unit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4106758