Sensing systems using current steering bridges

A system comprising:

• a processor;
• a bridge circuit comprising:
• a pair of differential voltage sources configured to drive the bridge circuit,
• a first pair of sensing elements;
• and
• a second pair of sensing elements communicatively coupled to the first pair of sensing elements and generating a pair of measurement signals, the pair of measurement signals are independent of one another and based on the respective second sensing element, the second pair of sensing elements defining a first divider, the first divider is configured to output a first output signal to the processor,
• wherein the first output signal is a differential signal of the first pair of sensing elements indicative of a quantity of a measurable medium;
• and a transducer communicatively coupled to the bridge circuit, wherein the differential signal output by the first divider is independent from a common mode signal.

A system comprising:

• a bridge circuit comprising:
• a pair of differential voltage sources configured to drive the bridge circuit,
• a first pair of sensing elements;
• a second pair of sensing elements communicatively coupled to the first pair of sensing elements and generating a first pair of measurement signals, the first pair of measurement signals are independent of one another and based on the respective second sensing element, the second pair of sensing elements define a first divider, the first divider is configured to output a first output signal,
• a third pair of sensing elements communicatively coupled to the first pair of sensing elements and in parallel with the second pair of sensing elements, the third pair of sensing elements generating a second pair of measurement signals, the second pair of measurement signals are independent of one another and based on the respective third sensing element, the third pair of sensing elements defining a second divider, the second divider is configured to output a second output signal,
• wherein the first output signal and the second output signal are connected to a divider, the divider provides a ratio-metric output the ratio-metric output is independent from a common mode noise.

A system comprising:

• a processor;
• a bridge circuit comprising:
• a pair of differential voltage sources configured to drive the bridge circuit,
• a first pair of sensing elements generating a pair of measurement signals, the pair of measurement signals are independent of one another and based on the respective sensing element, and
• a second pair of sensing elements communicatively coupled to the first pair of sensing elements, the second pair of sensing elements defining a first divider, the pair of measurement signals are input into the respective second sensing element of the second pair of sensing elements, the first divider is configured to output a first output signal to the processor,
• wherein the first output signal is a differential signal of the first pair of sensing elements
• a third pair of sensing elements communicatively coupled to the first pair of sensing elements and in parallel with the second pair of sensing elements, the third pair of sensing elements defining a second divider, the pair of measurement signals are input into the respective third sensing elements of the third pair of sensing elements to output a second output signal to the processor,
• wherein the second output signal is a second differential signal of the first pair of sensing elements.