Signal transmission system

Details Signal transmission system Signal transmission system

2007-05-11

2008-08-12

Allen, Andre J (Department: 2855)

Measuring and testing

Fluid pressure gauge

Diaphragm

C073S723000, C073S753000

Reexamination Certificate

active

07409866

ABSTRACT:
A single wire interface for a transducer transmits the transducer output as a frequency modulated signal over one single wire during one interval. During a second interval a reference signal is transmitted as a frequency modulated signal. Both the transducer output and the reference signal output are processed by the same circuitry during the respective intervals to provide both frequency modulated signals. The frequencies of the two signals are measured and then the ratio of the two periods which is the reciprocal of the two frequencies is calculated. This ratio is the direct measure of the output of the transducer and when provided eliminates sources of errors.

REFERENCES:
patent: 4672354 (1987-06-01), Kurtz et al.
patent: 5955771 (1999-09-01), Kurtz et al.
patent: 6363792 (2002-04-01), Kurtz et al.
patent: 6530282 (2003-03-01), Kurtz et al.
patent: 7124639 (2006-10-01), Kurtz et al.
patent: 7231828 (2007-06-01), Kurtz et al.

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