Current detection and overcurrent protection for transistors...

Details Current detection and overcurrent protection for transistors... Current detection and overcurrent protection for transistors...

2005-04-26

2005-04-26

Sherry, Michael (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

Reexamination Certificate

active

06885532

ABSTRACT:
A current detection circuit applicable to a switching circuit using switching transistors to supply a prescribed load current to a load, comprises a sample-hold capacitor for temporarily holding a terminal voltage of the switching transistor that is turned on, and a switch that is inserted between the switching transistor and sample-hold capacitor and is controlled to be turned on in synchronization with the ON-timing of the switching transistor, wherein charged voltage of the sample-hold capacitor is detected as a detection voltage. An overcurrent detection circuit is constituted in such a way that the switching transistor is compulsorily turned off when the detection voltage exceeds reference voltage. The switching circuit may correspond to a pulse-width modulation (PWM) amplifier using a pair of a PMOS transistor and an NMOS transistor that are alternately turned on or off.

REFERENCES:
patent: 4415863 (1983-11-01), Tokumo
patent: 5719519 (1998-02-01), Berringer
patent: 6246220 (2001-06-01), Isham et al.
patent: 57-131125 (1982-08-01), None
patent: 61-102816 (1986-05-01), None
patent: 62-065517 (1987-03-01), None
patent: 03-112319 (1991-05-01), None
patent: 11-239029 (1999-08-01), None
patent: 0164408 (1999-02-01), None
Korean Patent Office Office Action Dated Jun. 2, 2004.

Affiliated with

Also associated with

Rating

Current detection and overcurrent protection for transistors... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Current detection and overcurrent protection for transistors..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Current detection and overcurrent protection for transistors... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3424638