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Optical-analog-to-digital-converter

Input stage apparatus and method having a variable reference voltage

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***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST*** *** NO IMAGES AVAILABLE***

Description:...

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Vertical deflection circuit for a cathode-ray tube having a vertical image-position adjustment circuit

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Windshield wiper system

In the drawing the structural unit of an electric motor 11 with permanent magnets is designated 10....

Optical analog to digital converter

Details

Inventors: Balkanli, Hayati;
Assignee: Lynes, Inc. (Houston, TX)
Primary Examiner: Miller; Charles D.
Assistant Examiner:
Attorney, Agent or Firm: Norvell, Jr.; William C.

a Bourdon tube is situated down hole in an oil well or the like, and has attached thereto a coded wheel which rotates an amount determined by the sensed down hole pressure. The wheel has a number of transparent and opaque concentric bands thereon which form a gray code pattern indicative of a selected range of pressures. A plurality of radiant energy transmitters are radially positioned on one side of the wheel in optical alignment with each of the respective bands. A plurality of radiant energy sensors are positioned and aligned in a like manner on the other side of the wheel for sensing the passing or blocking of the radiant energy by the respective bands formed on the wheel. Included is a digital logic circuit controlled by a temperature responsive oscillator which provides timing signals having a frequency determined by the sensed down hole temperature. The logic circuit responds to the signals sensed by the sensors for providing a binary coded output signal indicative of the sensed down hole pressure and temperature, wherein the sequence of the bits in the signal is indicative of the pressure and the frequency of the signal is indicative of the temperature.

DETAILED DESCRIPTION According to the teachings of the present invention, environmental condition responsive apparatus includes means for sensing a first environmental condition, which includes means for providing a coded word having a code sequence indicative of the first environmental condition sensed.
There is means for sensing a second environmental condition, including means for providing a timing signal having a frequency indicative of the second environmental condition sensed.
Lastly, there is means for providing a coded environmental condition indicating signal in response to the provision of the coded word and the timing signal, wherein the coded environmental condition indicating signal has a code sequence indicative of the first environmental condition sensed and has a frequency indicative of the second environmental condition sensed.

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