Patent ID: 11874139
Assignee: HAMILTON SUNDSTRAND CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A system comprising:
a signal conditioning circuit comprising:
a first signal path comprising a first multiplexer connected to a first filter, wherein the first signal path receives a first secondary signal from a first sensor and a built in test (BIT) signal;
a second signal path comprising a second multiplexer connected to a second filter, wherein the second signal path receives a second secondary signal from the first sensor and the BIT signal;
wherein the first signal path and the second signal path are connected to a third multiplexer; and
a first analog to digital converter (ADC) connected to an output of the third multiplexer; and
a controller connected to an output of the first ADC, wherein the controller is configured to: determine a position measurement for the first sensor based on the first secondary signal, the second secondary signal, and the BIT signal;

wherein determining the position measurement for the first sensor based on the first secondary signal, the second secondary signal, and the built in test signal comprises calculating the position, whereby:

Position=(E1/BIT1_E1−E2/BIT1_E2)/(E1/BIT1_E1+E2/BIT1_E2),

wherein E1 comprises the first secondary signal, wherein E2 comprises the second secondary signal, wherein BIT1_E1 comprises the built in test signal traversing the first signal path, and wherein BIT1_E2 comprises the built in test signal traversing the second signal path.