Integrated sensor with capacitive coupling rejection to the...

Details Integrated sensor with capacitive coupling rejection to the... Integrated sensor with capacitive coupling rejection to the...

2007-12-03

2011-10-04

Phan, Huy Q (Department: 2858)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With amplifier or space discharge device

C324S109000

Reexamination Certificate

active

08030915

ABSTRACT:
An integrated sensor includes: i) a voltage regulator coupled with a mechanical ground and delivering a regulated voltage based on a primary power supply voltage referencing an electrical ground; ii) a high-impedance sensitive element powered by the primary power supply, electrically coupled to the mechanical ground and delivering an electrical quantity representative of a physical quantity; iii) an amplification module powered by the regulated voltage and including a first input receiving an analog reference dependent on the regulated voltage and a second input receiving the electrical quantity, and designed to deliver a first output voltage representing the amplified measurement voltage; and iv) a differential amplifier powered by the primary power supply voltage, referencing the electrical ground and including first and a second inputs receiving the analog reference and the first output voltage, respectively, and delivering a second output voltage representing the first amplified output voltage referenced to the electrical ground.

REFERENCES:
patent: 4857842 (1989-08-01), Sturman
patent: 5041780 (1991-08-01), Rippel
patent: 5656929 (1997-08-01), Humpherys
patent: 2004/0032246 (2004-02-01), Motz
patent: 0710825 (1996-05-01), None
patent: 9627979 (1996-09-01), None
International Search Report dated Apr. 9, 2008, in PCT application.

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