Accumulated current counter and method thereof

Details Accumulated current counter and method thereof Accumulated current counter and method thereof

2008-04-15

2008-04-15

Hirshfeld, Andrew H. (Department: 2858)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

For fault location

C324S076110, C324S426000, C320S132000

Reexamination Certificate

active

11380479

ABSTRACT:
An accumulated current counter (11) includes a sense resistor (30) configured for being coupled in series between an electronic circuit (13) and a power source (12). The sense resistor is further for use in sensing a voltage (VIN(i)) across the sense resistor as a function of a current (Ibatt) provided via the power source. An incremental counter (16) is coupled to the sense resistor for incrementally counting an amount of current, corresponding to an average value of charge Q, going (i) into or (ii) out of the power source. A register (63) accumulates a representation of the incrementally counted current. In one embodiment, the representation of incrementally counted current corresponds to a remaining power source life in hours and minutes.

REFERENCES:
patent: 5774733 (1998-06-01), Nolan et al.
patent: 6025695 (2000-02-01), Friel et al.

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