Measuring circuit and a method for determining a...

Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C702S066000, C702S067000, C702S118000, C324S637000

Reexamination Certificate

active

07555394

ABSTRACT:
A single chip integrated circuit measuring circuit (1) for determining a characteristic of the impedance of an external complex impedance circuit (2) for facilitating characterization of the impedance of the complex impedance circuit (2) comprises a signal generating circuit (7) for generating a variable frequency stimulus signal for applying to the complex impedance circuit (2). A first receiving circuit (10) receives a response signal from the complex impedance circuit (2) in response to the stimulus signal and conditions the response signal. A first analog-to-digital converter (68) converts the conditioned response signal to a first digital output signal, which is read from the first analog-to-digital converter (68) through a first digital output port (14). The response signal from the complex impedance circuit (2) is a current signal, and a current to voltage converter circuit (64) converts the response signal to a voltage signal. A first RMS to DC level converting circuit (70) converts the AC voltage of the response signal to a DC voltage level, and a fourth multiplexer (67) selectively applies the voltage response signal or the DC voltage level signal to the first analog-to-digital converter (68), depending on whether it is desired that the first digital output signal should be indicative of the phase shift or amplitude change in the response signal relative to the stimulus signal. A second receiving circuit (20) receives the stimulus signal, and similarly converts the stimulus signal to a second digital output signal for facilitating comparison of the response signal with the stimulus signal.

REFERENCES:
patent: 4526480 (1985-07-01), Ward
patent: 4831324 (1989-05-01), Asakura et al.
patent: 4832022 (1989-05-01), Tjulkov et al.
patent: 5042460 (1991-08-01), Sakurai et al.
patent: 5365179 (1994-11-01), Rogers
patent: 5633801 (1997-05-01), Bottman
patent: 5772597 (1998-06-01), Goldberger et al.
patent: 5805871 (1998-09-01), Baxter
patent: 5832412 (1998-11-01), Guez
patent: 6161420 (2000-12-01), Dilger et al.
patent: 6172483 (2001-01-01), Champlin
patent: 6295272 (2001-09-01), Feldman et al.
patent: 6642754 (2003-11-01), Dobramysl et al.
patent: 6867665 (2005-03-01), Manku et al.
patent: 6873916 (2005-03-01), Kolosov et al.
patent: 6906532 (2005-06-01), Slates
patent: 7077853 (2006-07-01), Kramer et al.
patent: 2002/0049551 (2002-04-01), Friedman et al.
patent: 2002/0103838 (2002-08-01), Kelly
patent: 2002/0114428 (2002-08-01), Nossing et al.
patent: 1325551 (1999-09-01), None
patent: 1364340 (2002-08-01), None
patent: 0338400 (1989-04-01), None
patent: 2737923 (1995-06-01), None
patent: WO 00/16428 (2000-03-01), None
patent: WO 03/040736 (2003-05-01), None
Basu, A. et al., “‘Smart sensing’ of oil degradation and oil level measurements in gasoline engines”, SAE Technical Paper Series, 2001-01-1366, SAE 2000 World Congress, Detroit, MI, Mar. 6-9, 2000.
Matsiev, L.F., “Application of flexural mechanical resonators to high throughput liquid characterization”, Symyx Technologies, 2000 IEEE International Ultrasonics Symposium, pp. 427-434.
PCT/IE2004/000121 international search report.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Measuring circuit and a method for determining 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 Measuring circuit and a method for determining a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measuring circuit and a method for determining a... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4081701

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.