Measuring and testing – Fluid pressure gauge – With pressure and/or temperature compensation
Reexamination Certificate
2008-03-27
2008-12-16
Allen, Andre (Department: 2855)
Measuring and testing
Fluid pressure gauge
With pressure and/or temperature compensation
C073S718000, C073S753000, C073S754000
Reexamination Certificate
active
07464598
ABSTRACT:
The invention provides for a method of sensing pressure with a pressure sensor having a sensor membrane and a compensation membrane. The pressure sensor also includes a power supply, a controller; and a charge amplifier, a charge injector and two switches arranged in signal communication with the controller. The method includes the step of connecting the charge amplifier to the switches via a sensor capacitor Csin parallel with a reference capacitor Crin parallel with a parasitic capacitance Cpto ground, the charge injector and charge amplifier arranged in parallel connection between the capacitors and the controller. The method also includes the step of operating the switches, via the controller, to determine a charge imbalance indicative of a pressure difference between the sensor and compensation membranes.
REFERENCES:
patent: 4120206 (1978-10-01), Rud, Jr.
patent: 4169389 (1979-10-01), Yasuhara et al.
patent: 4458537 (1984-07-01), Bell et al.
patent: 4572000 (1986-02-01), Kooiman
patent: 5233875 (1993-08-01), Obermeier et al.
patent: 5285097 (1994-02-01), Hirai
patent: 5499535 (1996-03-01), Amano et al.
patent: 5802911 (1998-09-01), Cahill et al.
patent: 5853020 (1998-12-01), Widner
patent: 5962791 (1999-10-01), Walchli et al.
patent: 5965821 (1999-10-01), Grudzien
patent: 6235174 (2001-05-01), Jaurnig
patent: 6405132 (2002-06-01), Breed et al.
patent: 6484080 (2002-11-01), Breed et al.
patent: 6526352 (2003-02-01), Breed et al.
patent: 6533316 (2003-03-01), Breed et al.
patent: 6648367 (2003-11-01), Breed et al.
patent: 6662642 (2003-12-01), Breed et al.
patent: 6733036 (2004-05-01), Breed et al.
patent: 6738697 (2004-05-01), Breed
patent: 6741169 (2004-05-01), Magiawata et al.
patent: 6758089 (2004-07-01), Breed et al.
patent: 6768944 (2004-07-01), Breed et al.
patent: 2003/0205089 (2003-11-01), Nelson et al.
patent: 0261972 (1988-03-01), None
patent: 0756164 (1997-01-01), None
patent: WO 03/106952 (2003-12-01), None
Mallinson Samuel George
Silverbrook Kia
Allen Andre
Jenkins Jermaine
Silverbrook Research Pty Ltd
LandOfFree
Method of pressure sensing with a pressure sensor having a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of pressure sensing with a pressure sensor having a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of pressure sensing with a pressure sensor having a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4032132