Abstract:
A lighting system for exterior lights of an automobile comprises a first lighting unit (10,12,14,16) primarily for outputting a first automotive light signal and a failure detection system (26) for detecting a failure of the first lighting unit (10,12,14,16). A second lighting unit is primarily for outputting a second automotive light signal. The second lighting unit comprises an LED light unit. A controller (30) is adapted to determine if there is failure of the first lighting unit, and if there is failure of the first lighting unit, to use the second lighting unit to generate the first automotive light signal. This is in response to an output request from the first lighting unit (10,12,14,16).
Abstract:
A method of characterising an LED, as well as an integrated circuit using this method, based on a so-called characteristic resistance, in which the LED is operated at a first, relatively low, operating current and then at a second, relatively high, operating current. From the ratio between the difference between the forward voltages at these two operating currents, and the difference between the operating current, the characteristic resistance is determined. The characteristic resistance is measured at two or more moments during the operational lifetime of the device, and a prediction or estimate is made in relation to the total operational lifetime of the devices, from the evolution or change of the characteristic resistance.
Abstract:
A sensor for sensing an analyte includes capacitive elements, each having a pair of electrodes separated by a dielectric wherein the dielectric constant of the dielectric of at least one of the capacitive elements is sensitive to the analyte, the sensor further including a comparator adapted to compare a selected set of capacitive elements against a reference signal and to generate a comparison result signal, and a controller for iteratively selecting the set in response to the comparison result signal, wherein the sensor is arranged to produce a digitized output signal indicative of the sensed level of the analyte of interest. An IC comprising such a sensor, an electronic device comprising such an IC and a method of determining a level of an analyte of interest using such a sensor are also disclosed.
Abstract:
A method of characterizing an LED, as well as an integrated circuit using this method, based on a so-called characteristic resistance, in which the LED is operated at a first, relatively low, operating current and then at a second, relatively high, operating current. From the ratio between the difference between the forward voltages at these two operating currents, and the difference between the operating current, the characteristic resistance is determined. The characteristic resistance is measured at two or more moments during the operational lifetime of the device, and a prediction or estimate is made in relation to the total operational lifetime of the devices, from the evolution or change of the characteristic resistance.
Abstract:
A sensor for sensing an analyte includes capacitive elements, each having a pair of electrodes separated by a dielectric wherein the dielectric constant of the dielectric of at least one of the capacitive elements is sensitive to the analyte, the sensor further including a comparator adapted to compare a selected set of capacitive elements against a reference signal and to generate a comparison result signal, and a controller for iteratively selecting the set in response to the comparison result signal, wherein the sensor is arranged to produce a digitized output signal indicative of the sensed level of the analyte of interest. An IC comprising such a sensor, an electronic device comprising such an IC and a method of determining a level of an analyte of interest using such a sensor are also disclosed.
Abstract:
A lighting system for exterior lights of an automobile comprises a first lighting unit (10,12,14,16) primarily for outputting a first automotive light signal and a failure detection system (26) for detecting a failure of the first lighting unit (10,12,14,16). A second lighting unit is primarily for outputting a second automotive light signal. The second lighting unit comprises an LED light unit. A controller (30) is adapted to determine if there is failure of the first lighting unit, and if there is failure of the first lighting unit, to use the second lighting unit to generate the first automotive light signal. This is in response to an output request from the first lighting unit (10,12,14,16).
Abstract:
A method is disclosed of controlling a LED, comprising driving the LED with a DC current for a first time, interrupting the DC current for a second time such that the first time and the second time sum to a period, determining at least one characteristic of the LED while the DC current is interrupted, and controlling the DC current during a subsequent period in dependence on the at least one characteristic. The invention thus benefits from the simplicity of DC operation. By operating at the LED in a DC mode, rather than say in a PWM mode, the requirement to be able to adjust the duty cycle is avoided. By including interruptions to the DC current, it is possible to utilize the LED itself to act as a sensor in order to determine a characteristic of the LED. The need for additional sensors is thereby avoided.
Abstract:
A damascene process is described using a copper fill process to fill a trench (12). The copper fill (20) is started with a deposited seed layer which includes (5) copper and titanium. Some titanium migrates to the surface during the copper fill process. The structure is annealed in a nitrogen atmosphere which creates a self-aligned TiN barrier (24) at the surface of the copper fill (20). Air gaps (26) may be created in the same annealing process. The process may be used to form a multilayer structure.
Abstract:
A damascene process is described using a copper fill process to fill a trench (12). The copper fill (20) is started with a deposited seed layer which includes (5) copper and titanium. Some titanium migrates to the surface during the copper fill process. The structure is annealed in a nitrogen atmosphere which creates a self-aligned TiN barrier (24) at the surface of the copper fill (20). Air gaps (26) may be created in the same annealing process. The process may be used to form a multilayer structure.
Abstract:
A method of manufacturing a semiconductor device with precision patterning is disclosed. A structure of a small dimension is created in a material, such as a semiconductor material, using a first and a second pattern, the patterns being identical but displaced over a distance with respect to each other. Two mask layers are used, wherein the first pattern is etched into the upper mask layer with a selective etch, and the second pattern is created on the upper mask layer or on the lower mask layer at locations where the upper mask layer has been removed. A part of the lower mask layer and/or the upper mask layer is etched according to the second pattern, resulting in a mask formed by remaining parts of the lower and upper mask layers, the mask having a structure with a dimension determined by a displacement of the second pattern with respect to the first pattern.