Signal Processing for Integrated Hall Effect Sensors Using Switched Capacitor Circuits

Hall effect sensors have been used for some time in application where presence detection over short distances is required, as a replacement for mechanical transducers. This has yielded improvements in reliability and manufacturing cost. The integration of the Hall transducer along with the signal conditioning circuit has improved overall performance and at the same time reduced the application cost. The implementation of a Hall transducer in an integrated technology itself is not a difficult process. Any resistive diffusion can be used as a primitive transducer, in a bipolar, CMOS of BiCMOS process. The transducer requires four contacts, two for biasing and two for sensing.