Undercurrent sense arrangement and method

Details Undercurrent sense arrangement and method Undercurrent sense arrangement and method

2004-05-14

2009-10-20

Nguyen, Ha Tran T (Department: 2829)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

Reexamination Certificate

active

07605598

ABSTRACT:
An on-state low current detector uses a transistor with main (32) and sense (34) cells. Feedback circuit (36) acts to keep the voltage across main cells (32) at a substantially constant target value when the load current falls below a level that generates the target voltage value in the main cells. The target voltage value is sufficiently high to ensure that the voltages of low current detection comparator (18) are readily measurable.

REFERENCES:
patent: 4743779 (1988-05-01), Valley
patent: 5018041 (1991-05-01), Szepesi
patent: 5760613 (1998-06-01), Pulvirenti et al.
patent: 5815027 (1998-09-01), Tihanyi et al.
patent: 6624994 (2003-09-01), Schmoock et al.

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