Apparatus and method for voltage sensing in electrical...

Details Apparatus and method for voltage sensing in electrical... Apparatus and method for voltage sensing in electrical...

2011-04-19

2011-04-19

Tang, Minh N (Department: 2858)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With amplifier or space discharge device

C324S127000

Reexamination Certificate

active

07928722

ABSTRACT:
A voltage isolation circuit. The input voltage Vin is connected to a primary winding of a transformer T1through a current limiting resistor R1. R1is preferably sized such that the current flow in the primary at nominal input voltage is approximately 1 milliamp. Transformer T1is wound as a current transformer with a fixed ratio between the primary and secondary windings. Thus, when 1 mA flows in the primary winding, 1 mA will also flow in the secondary winding. An inverting operational amplifier will continuously attempt to drive its inverting input to a zero potential through resistor R2. The voltage at Vout produced by the op-amp is a faithful replica of the voltage at Vin, but scaled according to the values selected for R1and R2.

REFERENCES:
patent: 3775683 (1973-11-01), Barta et al.
patent: 4054829 (1977-10-01), Searle
patent: 4970459 (1990-11-01), Germer et al.
patent: 5053697 (1991-10-01), Carnel et al.
patent: 5391983 (1995-02-01), Lusignan et al.
patent: 5548209 (1996-08-01), Lusignan et al.
patent: 5563506 (1996-10-01), Fielden et al.
patent: 5834932 (1998-11-01), May
patent: 6674278 (2004-01-01), Uesugi
patent: 7075288 (2006-07-01), Martin et al.
patent: WO 2007/056140 (2007-05-01), None

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