Abstract: A sensor system includes a first measurement subsystem including a driver and a measurement component. The measurement component includes a set of sensors for generating complementary signals representing each of one or more characteristics. The complementary signals representing a characteristic include related error components. The driver is configured to accept the complementary signals for a characteristic and to determine a measurement value for the characteristic by combining the complementary signals to reduce effects of the error components in the complementary signals.

Abstract: A sensor system includes a first measurement subsystem including a driver and a measurement component. The measurement component includes a set of sensors for generating complimentary signals representing each of one or more characteristics. The complimentary signals representing a characteristic include related error components. The driver is configured to accept the complimentary signals for a characteristic and to determine a measurement value for the characteristic by combining the complimentary signals to reduce effects of the error components in the complimentary signals.

Abstract: An inductively coupled electronic lock system wherein the key has a clock driven variable pulse width generator with alterable pulse sequence input to an inductor. The lock part of the system has an inductive pick-up which discriminates against all but a preselected sequence of pulses, converts the received signals to DC and powers a motor to open the lock.