1. Sensors with a digital or frequency output;Middelhoek;Sensors and Actuators,1988
2. Lateral-photoeffect position-sensitive detectors;Noorlag,1982
3. High resolution optical position sensor with integrated signal processing;Erb;Techn. Digest, 3rd Int. Conf. Solid-State Sensors and Actuators (Transducers '85), Philadelphia, PA, U.S.A.,11141985