Sensor device using pair of resistive sensor controlled beat...

Details Sensor device using pair of resistive sensor controlled beat... Sensor device using pair of resistive sensor controlled beat...

2007-06-26

2007-06-26

Benson, Walter (Department: 2858)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

C324S693000, C324S684000

Reexamination Certificate

active

11485381

ABSTRACT:
A sensor device is disclosed that includes a sensor, in which a resistance value is changed in accordance with a change in an environment of the sensor. The sensor device also includes a beat oscillator having plural oscillators of different oscillating frequencies. The beat oscillator generates a beat signal of a frequency lower than the oscillating frequencies. The beat signal corresponds to a difference of the oscillating frequencies. The beat oscillator is electrically connected to the sensor such that the frequency of the beat signal changes in accordance with the changes in the resistance value of the sensor.

REFERENCES:
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patent: 6223593 (2001-05-01), Kubisiak et al.
patent: 6385273 (2002-05-01), Hsu et al.
patent: 2005/0184876 (2005-08-01), Tokudome
patent: 9-147283 (1997-06-01), None
patent: 2001-91387 (2001-04-01), None
patent: 2003-273673 (2003-09-01), None

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