Abstract: A device having a pulse catching function for detecting fault test pulses in an electrical power distribution network in response to a fault. The device includes one or more sensors for measuring current and/or voltage, where the device detects the pulses by loss of voltage followed by identifying one or more of a peak current magnitude of the pulses being greater than a predetermined current value, a pulse duration of the pulses being greater than a predetermined time, a predetermined interval between consecutive pulses and a presence of a pulse/inverse pulse sequence.

Abstract: A system and method for identifying an earth fault in a resonant grounded medium voltage network that employs a REFCL compensation system. The method derives a zero-sequence real power from a phase voltage to ground on each phase and a current on each phase and aligns the zero-sequence real power in time with a magnitude of a zero-sequence voltage provided by the REFCL compensation system. The method determines when the zero-sequence real power and the zero-sequence voltage exceed predetermined thresholds. The method delays the magnitude of the zero-sequence voltage for a predetermined period of time when the zero-sequence voltage exceeds the threshold and determines that the fault is occurring when both the time aligned zero-sequence real power exceeds the threshold and the magnitude of the zero-sequence voltage exceeds the threshold for the predetermined period of time at the same time.

Abstract: A backpack with an integrated power supply connected to a removable solar panel in a panel pocket to receive solar energy to power the integrated power supply. The integrated power supply is configured to supply power to the user in multiple forms, including at least one USB charging station to power devices.

Abstract: A processor-based system for electronically presenting virtual brochures to a customer. The system has a server with a memory for holding information relating to the brochures. A processor generates a page of selected brochures, and arranges the brochures in tiers on the page. the processor selectively shuffles an order of the brochures within the tiers upon occurrences of generating the page. An output sends the page to a customer device. In this manner, clients of the system can pay to have their brochures in higher, more visible tiers as desired, but each brochure within a given tier is provided with the same visibility as the other brochures within the same tier.

Abstract: A brochure inventory and tracking system provides a method and apparatus for distributing and tracking brochures. A brochure inventory route is assigned to a driver of a vehicle. The brochure inventory route includes at least one brochure distribution point having at least one brochure rack having at least one brochure bin. A handheld device runs remote inventory software and is carried by the driver. A server runs central inventory software and communicates wirelessly with the handheld device. An estimated brochure level for each brochure bin and the number and identity of brochure necessary to refill each brochure bin are determined and the brochure bins are refilled. Information regarding the estimated brochure level for each brochure bin is uploaded to the server for analysis. Customer inventory software allows a customer to access substantially real time data regarding brochure distribution.

Abstract: A brochure inventory and tracking system provides a method and apparatus for distributing and tracking brochures. A brochure inventory route is assigned to a driver of a vehicle. The brochure inventory route includes at least one brochure distribution point having at least one brochure rack having at least one brochure bin. A handheld device runs remote inventory software and is carried by the driver. A server runs central inventory software and communicates wirelessly with the handheld device. An estimated brochure level for each brochure bin and the number and identity of brochure necessary to refill each brochure bin are determined and the brochure bins are refilled. Information regarding the estimated brochure level for each brochure bin is uploaded to the server for analysis. Customer inventory software allows a customer to access substantially real time data regarding brochure distribution.

Abstract: A gain adjustment circuit for maintaining the overall gain of a multi-component apparatus at a relatively constant level is disclosed. A multi-component apparatus in which the gain adjustment circuit may be implemented includes a first component and a second component. The first component has a variable gain, and receives as input a control signal which determines the gain of the component. The second component has an adjustable gain, and provides as output an output signal which affects the control signal fed to the first component. The gain adjustment circuit adjusts the adjustable gain of the second component based upon the control signal fed to the first component to maintain the overall gain of the components at a relatively constant level. More specifically, if the control signal is at a level which causes the variable gain of the first component to be high, then the gain adjustment circuit sets the adjustable gain of the second component to a low level.

Abstract: A charge pump having an automatic compensation capability comprises a current source and a current sink. The current source is selectively coupled to the output of the charge pump by a sourcing control. The sourcing control receives an input control signal and responds by controlling the sourcing current flowed from the current source to the output. Likewise, the current sink is selectively coupled to the output of the charge pump by a sinking control. The sinking control receives a second input control signal and responds by controlling the sinking current flowed from the output to the current sink. The charge pump further comprises a sensing circuit and a compensating circuit. The sensing circuit determines whether, given substantially identical input control signals, there is a difference between the sourcing current and the sinking current generated by the charge pump. If so, the sensing circuit provides at its output an indication of the current difference.

Abstract: A voltage to current (V-I) converter includes a low pass filter, a first converting element, a second converting element, and an output. The low pass filter receives an input voltage signal and outputs a filtered voltage signal. The output of the low pass filter is fed to the first converting element, which converts the filtered voltage signal into a corresponding output current which is fed to the output of the V-I converter. Preferably, the voltage to current gain of the first converting element is high. The low pass filter and the first converting element form a low frequency or DC signal path. The V-I converter further includes a second converting element, which receives the input voltage signal and converts it into a corresponding output current which is also fed to the output of the V-I converter. This current is combined with the output current from the first converting element to produce an overall output current.