Integrated sensor array with offset reduction

A method for providing increased accuracy in a complementary metal oxide semiconductor substrate (CMOS) sensor system, comprising:

• (a) establishing a first state condition by connecting a first terminal of a first of a plurality of sensor elements in an array of sensor assemblies on the CMOS substrate to an input, and connecting a second terminal of the first of the plurality of sensor elements to an output;
• (b) generating a first sensor element signal for the first state condition;
• (c) storing a first data associated with the first sensor element signal;
• (d) establishing a second state condition by connecting the first terminal of the first of a plurality of sensor elements to the output, and connecting the second terminal of the first of the plurality of sensor elements to the input;
• (e) generating a second sensor element signal for the second state condition;
• (f) storing a second data associated with the second sensor element signal;
• (g) performing (a)-(f) for each of the other of the plurality of sensor elements in the array of sensor assemblies;
• (h) calculating a plurality of offsets, each of the plurality of offsets associated with one of the plurality of sensor elements, using the stored first data and the stored second data;
• and
• (i) generating a sensor system output using the calculated plurality of offsets.

A complementary metal oxide semiconductor (CMOS) sensor system, comprising:

• a substrate with a power bus and a readout bus;
• a sensor array on the substrate and including a plurality of sensor assemblies, each of the plurality of sensor assemblies including
• a first sensor element with a first terminal and a second terminal,
• a first switch, and
• a second switch;
• a memory on the substrate including command instructions for (i) generating a first sensor assembly signal with each of the first sensor elements by connecting the first terminal to the power bus and connecting the second terminal to the readout bus, (ii) storing for each of the first sensor assembly signals, a first data associated with the respective first sensor assembly signal, (iii) generating a second sensor assembly signal with each of the first sensor elements by connecting the first terminal to the readout bus and connecting the second terminal to the power bus, (iv) storing for each of the second sensor assembly signals, a second data associated with the respective second sensor assembly signal, and (v) calculating a respective offset for each of the plurality of sensor assemblies using the associated first data and associated second data;
• and
• a processor for executing the command instructions.