Abstract: A control loop circuit for use in a closed-loop control system that controls a system such as a linear motor is presented. The control loop circuit includes a lead-lag compensator that features a lead compensation network configured to reduce output noise without substantially changing the effect of the lead compensation in the control system's frequency response.

Abstract: A magnetic field sensor and a method associated with the magnetic field sensor provide gain correction coefficients and/or offset correction coefficients stored in the magnetic field sensor in digital form. The gain correction coefficients and/or offset correction coefficients can be used to generate analog control signals to control a sensitivity and/or an offset of an analog signal path through the magnetic field sensor.

Abstract: A control loop circuit for use in a closed-loop control system that controls a system such as a linear motor is presented. The control loop circuit includes a lead-lag compensator that features a lead compensation network configured to reduce output noise without substantially changing the effect of the lead compensation in the control system's frequency response.

Abstract: A sensor minimizes effects of sensor element misalignment with respect to a magnet. In one embodiment, a sensor comprises a magnet, first, second, third, and fourth sensor elements positioned in relation to the magnet, and a signal processing module to process output signals from the first, second, third, and fourth sensor elements and generate first and second differential signals for minimizing effects of positional misalignment of the first, second, third, and fourth sensor elements with respect to the magnet by maximizing a quadrature relationship of the first and second differential signals.

Abstract: A unitary one piece badge holder for attachment to a garment, e.g., fabric pocket. The holder includes a substantially planar clip body having a front and rear surface and side edges. An opening in the clip body passes through the front and rear surfaces forming a periphery structure in the clip body. The structure has an interior wall surrounding the opening. A substantially planar flexible central spring member having front and rear surfaces and a surrounding edge surface appends from a top portion of the periphery structure. The opposing free end terminates within the opening near a bottom portion of the structure. The spring member and periphery structure are within the same plane. The gap between the surrounding edge surface of the spring member and the interior wall of the periphery structure decreases in width from the bottom portion of the peripheral structure to the top portion of the peripheral structure.

Abstract: An indicator is disclosed that detects the presence of a chemical residue. The indicator includes a substrate having an upper surface and a lower surface and a first portion and a second portion joined at a fold line. The first portion is smaller in area than the second portion. An adhesive coats the upper surface of at least the second portion of the substrate. A first reactant is adhered to the upper surface of the first portion of the substrate. When the second portion is contacted with a surface containing the chemical residue, the residue adheres to the adhesive and when the first portion is subsequently folded along the fold line so that the upper surfaces of the substrate contact each other, a portion of the adhesive on the second portion remains exposed and the first reactant and chemical residue react to provide the color indicia indicating the presence of the chemical residue.

Abstract: An indicator is disclosed that detects the presence of a chemical residue. The indicator includes a substrate having an upper surface and a lower surface and a first portion and a second portion joined at a fold line. The first portion is smaller in area than the second portion. An adhesive coats the upper surface of at least the second portion of the substrate. A first reactant is adhered to the upper surface of the first portion of the substrate. When the second portion is contacted with a surface containing the chemical residue, the residue adheres to the adhesive and when the first portion is subsequently folded along the fold line so that the upper surfaces of the substrate contact each other, a portion of the adhesive on the second portion remains exposed and the first reactant and chemical residue react to provide the color indicia indicating the presence of the chemical residue.

Abstract: A motion control device for controlling a motor is presented. The motion control device is operable to scale or adjust an input relative to an input range that is based on calibration values and to use that scaled input to produce a drive signal to drive the motor. The motion control device performs a self-calibration to produce the calibration values. The self-calibration involves measuring home position and full travel position values for the motor.

Abstract: A mechanism for assigning unique addresses to identical devices attached to a serial bus is presented. Each device has at least one output and is provided with a storage device to provide a configurable portion of a bus address having a fixed portion and a configurable portion. The device is further provided with circuitry, coupled to the storage device and the output, to determine a state of the output and use the state to configure the configurable portion. Once the configurable portion is configured, the bus address uniquely identifies the device. Such configuration allows more than one such device to be coupled to the same serial bus, e.g., an I2C bus.

Abstract: A time indicator that provides a color indicia after a predetermined period of time has passed after activation. The time indicator includes a substrate, e.g., a clear or transparent substrate, having an upper surface and a lower surface and a first portion and a second portion joined at a fold line. The first portion is of a smaller area than the second portion. An adhesive coats the upper surface of at least the second portion of the substrate. A first reactant is adhered to the upper surface of the first portion of the substrate and a second reactant is adhered to the upper surface of the second portion of the substrate. When the first portion is folded along the fold line so that the upper surfaces of the substrate contact each other, a portion of the adhesive on the second portion remains exposed. This exposed area may be used to attach the indicator to an article or documents.

Abstract: A self-expiring badge or label that includes an upper substrate having an upper surface and a lower surface and an adhesive activator layer on the lower surface. A protective layer having a first surface and a second surface is provided, with the first surface of the protective layer being removably attached to and overlaying the adhesive layer. A lower substrate is provided that has an upper surface and a lower surface, the upper surface being removably attached to and overlaying the second surface of the protective layer. A migrating ink pattern is on the lower surface of the lower substrate. To activate, the upper substrate and at least a portion of the lower substrate are removed from the protective layer to leave a remaining portion of the lower substrate having the migrating ink pattern thereon.

Abstract: A self-expiring badge or label is provided that includes a clear substrate, an opaque adhesive layer, a liner web, and an ink pattern is provided. The clear substrate has a back surface and a front surface with the opaque adhesive layer on the back surface. The liner web has a first surface and a second surface, where the adhesive layer secures the substrate to the first surface. The ink pattern is on at least a portion of the second surface. Upon removal of the liner web from the adhesive layer, the portion remains secured to the clear substrate by the adhesive layer and the clear substrate is foldable to place the ink pattern in contact with the adhesive layer. The ink pattern migrates through the adhesive layer in a selected time interval and is visible through the clear substrate when the ink pattern is in contact with the adhesive layer.

Abstract: A control loop circuit for use in a closed-loop control system that controls a system such as a linear motor is presented. The control loop circuit includes a lead-lag compensator that features a lead compensation network configured to reduce output noise without substantially changing the effect of the lead compensation in the control system's frequency response.

Abstract: As the present invention's adaptation process is typically practiced, an observation made by one or more sensing element(s) is classified as being either recognized or unrecognized in the context of a knowledge base. If the observation is classified as being recognized and consistent, then the observation is assimilated into the knowledge base; otherwise, it is not assimilated. If the observation is classified as being unrecognized, then the observation is classified as being uncorroborated in the context of the knowledge base. Prior to being classified as being uncorroborated, the unrecognized observation is categorized in the context of the knowledge base and is associated with an outcome in terms of relationship between/among physical parameters. At the time that corroboration is determined, the observation (originally unrecognized) and its categorization-related and association-related information are assimilated into the knowledge base.

Abstract: A process for validating an identification badge or plastic card for a plurality of predetermined periods of time. The process includes generating, preferably randomly, an initial image for an initial predetermined period of time and then transmitting this initial image to a printing device. The printing device prints the image on the identification badge to thereby validate the badge for the initial predetermined period of time. Thereafter, a subsequent image is randomly generated for a subsequent predetermined period of time. This subsequent image is then transmitted to the printing device. The initial image is then removed from the identification badge and the subsequent image printed on the identification badge to validate the badge for the subsequent predetermined period of time.

Abstract: A motion control device for controlling a motor is presented. The motion control device is operable to scale or adjust an input relative to an input range that is based on calibration values and to use that scaled input to produce a drive signal to drive the motor. The motion control device performs a self-calibration to produce the calibration values. The self-calibration involves measuring home position and full travel position values for the motor.