Linearized bridge circuitry
AssigneeThe Perkin-Elmer Corporation
InventorLarkin B. Scott
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Abstract
Where the unknown leg of a bridge is a sensor which presents a resistance that relates to a parameter by a second order polynomial, a negative feedback circuit from the conventional null measurement terminals to a voltage divided point in the balance leg thereof is included to provide a substantially linear relationship between the parameter of the sensor and a ratio including two voltage levels from the feedback circuit. A circuit means for continuously monitoring this ratio of voltages with a counter in recurring cycles for digital display is incorporated with the linearized bridge circuit of this invention in a particular embodiment thereof.
Claims9
In a linearized bridge circuit of the type wherein a sensor presenting a resistance related to a parameter by a second order polynomial is disposed in the unknown leg and a voltage divider is disposed in the balance leg, the improvement comprising:
- circuit means for continuously balancing the bridge circuit with feedback from across the conventional null measurement terminals thereof to a voltage divided point in the balance leg thereof, the voltage at said point divided by the current level of said feedback having substantially a linear relationship to the parameter of the sensor.
Dependencies are inferred from the claim text.