Current sensing circuit formed in narrow area and having sensing

Details Current sensing circuit formed in narrow area and having sensing Current sensing circuit formed in narrow area and having sensing

1997-08-05

1998-10-27

Lefkowitz, Edward

Communications: electrical

Condition responsive indicating system

Specific condition

323312, 361 93, 326 82, G08B 2100

Patent

active

058283080

ABSTRACT:
A current sensing circuit is provided for a current driving transistor to see whether or not excess current flows into an external load, a vertical transistor serves as the current driving transistor and a resistor for converting the amount of driving current to a potential drop, and a drain node connected to a power supply line, and a source node connected to the external load and a sensing node connected to a voltage comparator are provided on a major surface of a semiconductor substrate so as to supply various electric powers through a plurality of current driving transistors respectively accompanied with current sensing circuits and integrated on a single semiconductor chip to the external load.

REFERENCES:
patent: 4121122 (1978-10-01), Pokrandt
patent: 4250501 (1981-02-01), Pokrandt
patent: 4553084 (1985-11-01), Wrathall
patent: 5008586 (1991-04-01), Miyazaki et al.
patent: 5521536 (1996-05-01), Yamashita et al.
patent: 5670867 (1997-09-01), Mitsuda

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