Abstract: Composite galvanomagnetic devices having a desired combination of properties in specific temperature ranges and magnetic field ranges and so combined that desired properties are provided over an extended temperature and magnetic field range. In practice this can be accomplished with a single die with layers of different properties. Particularly, the present invention addresses this method as related to magnetoresitors and Hall plates.

Abstract: A magnetoresistor voltage divider includes a bottom layer disposed on a substrate. A middle layer is disposed on the bottom layer. A top layer is disposed on the middle layer. The bottom and top layer are resistive layers and the middle layer is an insulating layer. A common terminal is connected to the bottom layer and the top layer. A reference resistor terminal is connected to the bottom layer only. Moreover, a sensing MR terminal is connected to the top layer only. Accordingly, a sensing MR is established between the common terminal and the sensing MR terminal and a reference resistor is established between the common terminal and the reference resistor terminal. Thus, the sensing MR is stacked on top of the reference resistor.

Abstract: A magnetoresistor voltage divider includes a bottom layer disposed on a substrate. A middle layer is disposed on the bottom layer. A top layer is disposed on the middle layer. The bottom and top layer are resistive layers and the middle layer is an insulating layer. A common terminal is connected to the bottom layer and the top layer. A reference resistor terminal is connected to the bottom layer only. Moreover, a sensing MR terminal is connected to the top layer only. Accordingly, a sensing MR is established between the common terminal and the sensing MR terminal and a reference resistor is established between the common terminal and the reference resistor terminal. Thus, the sensing MR is stacked on top of the reference resistor.

Abstract: The present invention is directed to a system for acoustically controlling an automotive or aircraft vehicle's automatic climate control system. The acoustic HVAC control system determines an average air temperature using an ultrasonic transducer. The transducer transmits and receives an ultrasonic pulse along a pre-selected path within the vehicle's interior and concurrently measures the interval time between sending and receiving the pulse. An average air temperature is calculated based on the interval time. The determined average air temperature is evaluated against a pre-selected setpoint temperature and determines whether the vehicle's automatic climate control system controller controls an air blower fan speed, discharge temperature, and air delivery mode to the cabin to adjust the vehicle's interior air temperature near an occupant to a desired temperature.

Abstract: A circuit and method of providing desired response from magnetic field sensors to a predetermined magnetic function. Typically, magnetic field sensors, such as magnetoresistive devices and Hall effect sensors, provide an output which is a characteristic function of the magnetic field density, and so they do not generate a linear response in relation to any predetermined magnetic function, such as is required within numerous position or angle resolving circuits. The present invention utilizes two or more magnetically sensitive devices to tailor the overall sensor output signal to any desired function of the magnetic field density. The devices are connected in such a way that they mutually effect each other's voltages or currents to render the final desired output characteristic.

Abstract: Doping levels for a magnetoresistor material doped with n-type tellurium (Te) atoms for providing a temperature independent, single element magnetoresistor sensor. In a preferred form, the magnetoresistor material is an epitaxial thin film of indium antimonide (InSb), typically 1.5 micrometers thick, grown on a gallium arsenide (GaAs) substrate having a donor atom concentration between 2×1017 cm−3 and 10×1017 cm−3, wherein a magnetoresistor sensor (50) formed therefrom uses a background magnetic field (418, 420) of between about 0.1 Tesla to about 0.5 Tesla.

Abstract: A magnetic field sensor is described that has a 0.25-0.6 micrometer thick magnetically active layer of very high electron mobility that consists essentially of epitaxial indium antimonide. The indium antimonide layer is disposed on a 0.03-1.0 micrometer thick buffer layer of In.sub.1-x Al.sub.x Sb, where "x" is about 0.01-0.2, that is substantially lattice-matched to the indium antimonide active layer.

Abstract: An apparatus comprising a light source and a deformable mirror device including a matrix of individually controllable mirrors, each controllable mirror having first state reflecting light from the light source into a light path and a second state reflecting light from the light source away from the light path. An optical element is disposed in the light path projecting a virtual image of the deformable mirror device wherein the virtual image conveys information to a viewer of the projected image.