Methods and apparatus by which a transducer is employed to create a digital signal representing numerically the value of a changeable physical parameter. The signal from the transducer is subject to large and unpredictable amounts of offset due to either or both (i) manufacturing tolerance departures...http://www.google.es/patents/US4817022?utm_source=gb-gplus-sharePatente US4817022 - Method and apparatus for automatic offset compensation in parameter-sensing transducer systems
Method and apparatus for automatic offset compensation in parameter-sensing ...