Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2007-04-10
2007-04-10
Nguyen, Long (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
C327S541000, C327S538000
Reexamination Certificate
active
11120993
ABSTRACT:
A voltage measurement circuit is provided which converts a voltage of a first voltage source connected in series with an offset voltage source to an output voltage, including first and second current mirrors for accurately measuring voltage so as to provide a proportional output voltage with the offset voltage removed. Further, voltage measurements can be precisely determined for each of a plurality of voltage sources, such as a plurality of electrochemical cells in a series electrical connection. By virtue of the voltage measurement circuit, the effect of different offset voltage values on the measured voltage is minimized. Also, the voltage measurement circuit exhibits enhanced stability to variations in operating temperature. Accordingly, accuracy of voltage measurements where offset voltages are present is improved.
REFERENCES:
patent: 4495425 (1985-01-01), McKenzie
patent: 5910723 (1999-06-01), Perelle
patent: 5926062 (1999-07-01), Kuroda
patent: 6166549 (2000-12-01), Ashtiani et al.
patent: 6411097 (2002-06-01), Ashtiani et al.
patent: 6466083 (2002-10-01), Barnes
Hoffman Philip K.
Sack Thomas T.
SAFT
Sughrue & Mion, PLLC
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