Abstract: An apparatus comprises a controller operative to: i) monitor a resonant voltage associated with a primary winding magnetically coupled to a secondary winding; ii) control a flow of current through the primary winding to produce an output voltage at the secondary winding; and iii) control magnetization of the primary winding with respect to a detected a zero crossing event associated with the monitored resonant voltage. The controller further controls a duration of activating a switch coupled to an auxiliary winding (which is magnetically coupled to the primary winding) based on a magnitude of the monitored resonant voltage and/or a magnitude of an input voltage supplied to the primary winding. The controller operates in different modes of magnetizing the primary winding such as at peaks or valleys of the monitored resonant voltage depending on a magnitude of the input voltage.

Abstract: This invention relates to attachable personal cooling fans specifically designed to provide several hours of cooling for the user. These units were originally designed for baseball/softball plate umpires for hot weather conditions, however, they could be adapted for other uses. The units are portable and lightweight and can be attached to any facemask.

Abstract: This invention relates to attachable personal cooling fans specifically designed to provide several hours of cooling for the user. These units were originally designed for baseball/softball plate umpires for hot weather conditions, however, they could be adapted for other uses. The units are portable and lightweight and can be attached to any facemask.

Abstract: An apparatus comprises a controller operative to: i) monitor a resonant voltage associated with a primary winding magnetically coupled to a secondary winding; ii) control a flow of current through the primary winding to produce an output voltage at the secondary winding; and iii) control magnetization of the primary winding with respect to a detected a zero crossing event associated with the monitored resonant voltage. The controller further controls a duration of activating a switch coupled to an auxiliary winding (which is magnetically coupled to the primary winding) based on a magnitude of the monitored resonant voltage and/or a magnitude of an input voltage supplied to the primary winding. The controller operates in different modes of magnetizing the primary winding such as at peaks or valleys of the monitored resonant voltage depending on a magnitude of the input voltage.

Abstract: In some examples, a controller is configured to control a primary-side switch in a power converter circuit, and the controller includes a first node configured to receive a first signal indicating a current or a voltage through a primary side of a transformer of the power converter circuit. The controller also includes a second node configured to receive a second signal indicating a current or a voltage through a primary-side switch of the power converter circuit. The controller further includes processing circuitry configured to determine a target value for the second signal based on the first signal and generate the control signal for the primary-side switch based on the target value for the second signal.

Abstract: This invention relates to attachable personal cooling fans specifically designed to provide several hours of cooling for the user. These units were originally designed for baseball/softball plate and base umpires for hot weather conditions, however, they could be adapted for other uses. The units are portable and lightweight and can be attached to any facemask or cap.

Abstract: In some examples, a controller is configured to control a primary-side switch in a power converter circuit, and the controller includes a first node configured to receive a first signal indicating a current or a voltage through a primary side of a transformer of the power converter circuit. The controller also includes a second node configured to receive a second signal indicating a current or a voltage through a primary-side switch of the power converter circuit. The controller further includes processing circuitry configured to determine a target value for the second signal based on the first signal and generate the control signal for the primary-side switch based on the target value for the second signal.

Abstract: This invention relates to attachable personal cooling fans specifically designed to provide several hours of cooling for the user. These units were originally designed for baseball/softball plate and base umpires for hot weather conditions, however, they could be adapted for other uses. The units are portable and lightweight and can be attached to any facemask or cap.

Abstract: In one example, a method includes activating, by a controller of a power converter, a switch of the power converter that controls an amount of energy provided by the power converter; receiving, by an input of the controller, a signal that represents an amount of current flowing through the switch; responsive to determining that the amount of current flowing through the switch is greater than or equal to a threshold amount of current, deactivating, by the controller, the switch; and responsive to determining that an amount of time elapsed since activation of the switch is greater than a threshold amount of time, deactivating, by the controller, the switch.

Abstract: In one example, a method includes activating, by a controller of a power converter, a switch of the power converter that controls an amount of energy provided by the power converter; receiving, by an input of the controller, a signal that represents an amount of current flowing through the switch; responsive to determining that the amount of current flowing through the switch is greater than or equal to a threshold amount of current, deactivating, by the controller, the switch; and responsive to determining that an amount of time elapsed since activation of the switch is greater than a threshold amount of time, deactivating, by the controller, the switch.

Abstract: Fibers that are formed from a thermoplastic composition that contains a polymer and high surface area nanostructures are provided. The fibers have a voided structure and low density while maintaining good strength characteristics. To achieve such a structure, a blowing agent in the thermoplastic composition is activated during extrusion to form bubbles in the fibers. The high surface area nanostructures in the formed fibers can be formed of or carry the blowing agent and can enhance the strength of the fibers and compensate for the non-load bearing voids of the fibers.

Abstract: A method in a portable electronic device (100) having a user interface illumination (110) is disclosed. The method comprises sensing (202) an ambient light level in a neighborhood of the portable electronic device with a sensor (104) of the portable electronic device. Based on the ambient light level sensed, then controlling (204) a visual characteristic of the user interface illumination, wherein the user interface illumination is operated at a brightness between a maximum brightness and a minimum brightness for at least one ambient light level detected.

Abstract: The present invention provides an electronic device comprising a battery terminal (240) for coupling the electronic device (100) to a battery (280), a battery temperature terminal (242) for providing a battery temperature signal indicative of a temperature of the battery, a switch (210) selectively providing bi-directional coupling of a charging input (275) to the battery terminal (240), a power supply feed line ((B+)) coupling the charging input to at least one module (103, 102) of the electronic device (100), a diode (212, 220) providing continuous one way coupling from the battery terminal (240) to the power supply feed line ((B+)), a battery charging detector (235) having charging detect output (237), and a controller (230) having a control output (233) coupled to a control switch input (216) of the switch (210) and inputs coupled to both the battery temperature terminal (242) and the charging detect output (237), wherein in use the controller (230) open circuits the switch (210) in response to both recei

Abstract: A wireless, programmable system for bio-potential signal acquisition (e.g., electrocardiogram (ECG) data) includes a base unit and a plurality of individual wireless, remotely programmable transceivers that connect to patch electrodes. The base unit manages the transceivers by issuing registration, configuration, data acquisition, and transmission commands using wireless techniques. Bio-potential signals from the wireless transceivers are demultiplexed and supplied via a standard interface to a conventional monitor for display.

Abstract: A method in a portable electronic device (100) having a user interface illumination (110) is disclosed. The method comprises sensing (202) an ambient light level in a neighborhood of the portable electronic device with a sensor (104) of the portable electronic device. Based on the ambient light level sensed, then controlling (204) a visual characteristic of the user interface illumination, wherein the user interface illumination is operated at a brightness between a maximum brightness and a minimum brightness for at least one ambient light level detected.

Abstract: A wireless, programmable system for bio-potential signal acquisition (e.g., electrocardiogram (ECG) data) includes a base unit and a plurality of individual wireless, remotely programmable transceivers that connect to patch electrodes. The base unit manages the transceivers by issuing registration, configuration, data acquisition, and transmission commands using wireless techniques. Bio-potential signals from the wireless transceivers are demultiplexed and supplied via a standard interface to a conventional monitor for display.

Abstract: A wireless, programmable system for bio-potential signal acquisition (e.g., electrocardiogram (ECG) data) includes a base unit and a plurality of individual wireless, remotely programmable transceivers that connect to patch electrodes. The base unit manages the transceivers by issuing registration, configuration, data acquisition, and transmission commands using wireless techniques. Bio-potential signals from the wireless transceivers are demultiplexed and supplied via a standard interface to a conventional monitor for display.

Abstract: A wireless, programmable system for medical monitoring includes a base unit and a plurality of individual wireless, remotely programmable biosensor transceivers. The base unit manages the transceivers by issuing registration, configuration, data acquisition, and transmission commands using wireless techniques. Physiologic data from the wireless transceivers is demultiplexed and supplied via a standard interface to a conventional monitor for display. Initialization, configuration, registration, and management routines for the wireless transceivers and the base unit are also described.

Abstract: This invention provides a single unit called a personal communicator that combines the functions of a cell phone (or mobile phone), a body-supported computer and a pager. The personal communicator has three detachable modules: 1. a communications module; 2. a display module; and 3. a core computer module The core computer module has all of the components of a general purpose computer. Each of the modules when detached can be used in other systems such as with larger screens.