Apparatus, methods, and systems for incorporating and reading a plurality
of bridge sensors is disclosed. The bridge sensors may be capacitive
bridge sensors located on the same substrate with a digital processor and
signal processing circuits to read the outputs of the sensors. The bridge
sensors are accessed by a switch network coupled to the plurality of
bridge sensors to selectively provide an output from at least one of the
plurality of bridge sensors. The switch network may be a multiplexer,
which provides a periodically oscillating voltage to the sensors, to
energize the sensors. The multiplexer may also provide output from the
energized sensor to the digital processor.