Abstract: The invention is composed of peak current generator, peak current detector, peak current error amplifier and compensator, peak current controller and MOSFET driver. The advantage of the invention is to control switching converter's inductor peak current in high accuracy. The invention can automatically compensate error due to inductor current rising slope, the delay times Td, Tp of comparator and driver and comparator's offset voltage. The invention can largely decrease performance requirements of comparator and driver circuit and help to down the cost to implement the system.

Abstract: A switching adapter control method for adaptive mobile power systems is composed of reference current generator, current mode error compensator, controllable constant turn-off timer, PWM generator and MOSFET driver. The output of the switching adapter can show constant current and voltage characteristics, that means, as the DC bus voltage is over a preset voltage, the adaptor's output characteristic is converted from a constant current source into a constant voltage source with the preset voltage. For low output capacitance case, the present invention has the ability to smoothly reduce the switching frequency of the switching adaptor and reduce the switching losses and meet Energy Star 2.0 requirements under different load conditions. And the output ripple current and voltage can be in the allowed range.

Abstract: The isolated current regulated DC-DC converter is composed of the step down switch SA, free wheel diode DA, step down inductor L, switches S1 and S2, capacitor Cc to absorb the leakage energy of the switching transformer, output diodes D3 and D4, output filter capacitor C and the switching transformer T; one terminal of the step down inductor L is connected with the step down switch SA and free wheel diode DA, and other terminal of the step down inductor L is connected with one of primary windings of the switching transformer and switch S1 or S2; two primary windings of the switching transformer are respectively connected with switches S1 and S2 in series; two primary winding and switch S1 or S2 branches are paralleled and respectively connected with the free wheel diode DA and the step down inductor L; the free wheel diode DA is series with the step down switch SA and they connect with the input voltage Vin; the capacitor Cc to absorb the leakage energy of the switching transformer is respectively connected

Abstract: An embodiment of a power-supply controller includes a signal combiner and a control circuit. The signal combiner is operable to generate a combined feedback signal from sense and output feedback signals that are respectively derived from a sense signal and a regulated output signal, and the signal combiner is operable to receive the sense signal from a sense circuit that is operable to generate the sense signal while a current is flowing through an inductor and while a switch that is disposed between the inductor and an input voltage has a first state. The sense signal generated by the sense circuit is related to the current, and the switch and the inductor are operable to generate the regulated output signal. The control circuit is coupled to the signal combiner and is operable to cause the switch to have a second state for a predetermined time in response to the combined feedback signal having a predetermined relationship to a reference signal.

Abstract: The invention presents a simple and high accuracy output current detect and control scheme to control the output current of the step up-down (Buck-Boost) and step up (Boost) switching converter, It makes step up-down (Buck-Boost) and step up (Boost) switching power converter operate in wide input voltage range and low in total BOM cost and the switching converter can be used as a controllable current source for several applications

Abstract: A an engine management system includes a processor (8) in communication with a memory (10) that contains a program memory (28) containing instructions for the processor to implement a knock detection method. The knock detection method involves firstly sampling a torque sensor (4) that is responsive to an engine crankshaft (5). The torque sensor is sampled a number of times during a combustion stroke of one or more of cylinders (18a, . . . 18d) of the engine (16). The sampled sensor values are processed to calculate a rate of change of the torque signal and knocking is deemed to be indicated in the event of the rate of change exceeding a predetermined value. In a preferred embodiment the processor (8) is further programmed to reduce knocking once it has been detected by adjusting one or more of a number of controllers including a fuel injection controller (34), an ignition controller (12), a throttle controller (13) and an exhaust gas recirculation controller (39).

Abstract: A portable electronic device includes a positioning module, a memory, a searching module, and a display module. The positioning module is used for receiving positioning signals and determining a current position of the portable electronic device according to the positioning signals. The memory is used for storing electronic map information, bus route information, and mapping relations between the electronic map information and the bus route information. The searching module is used for searching the nearest bus station corresponding to the current position of the portable electronic device and bus routes that goes to the nearest bus station in the memory. The display module is used for displaying the nearest bus station and the bus routes that goes to the nearest bus station on the electronic map.

Abstract: An engine management apparatus for an internal combustion engine of a vehicle includes a microprocessor that is operable on adjustment mechanisms of the vehicle. The vehicle has a torque sensor for sensing torque generated by the engine and the adjustment mechanisms adjust parametric values related to the torque. Memory circuitry is accessible by the microprocessor. The memory circuitry stores data representing at least one set of parametric values and a range of torque values corresponding to respective parametric values in the set. A set of instructions are executable by the microprocessor so that the microprocessor cyclically retrieves a real time torque value from the torque sensor and updates the memory if the retrieved torque value is higher than a stored torque value corresponding to a current parametric value. The microprocessor adjusts the current parametric value if the retrieved torque value is lower than the stored torque value.

Abstract: An engine management apparatus for an internal combustion engine of a vehicle includes a microprocessor that is operable on adjustment mechanisms of the vehicle. The vehicle has a torque sensor for sensing torque generated by the engine and the adjustment mechanisms adjust parametric values related to the torque. Memory circuitry is accessible by the microprocessor. The memory circuitry stores data representing at least one set of parametric values and a range of torque values corresponding to respective parametric values in the set. A set of instructions are executable by the microprocessor so that the microprocessor cyclically retrieves a real time torque value from the torque sensor and updates the memory if the retrieved torque value is higher than a stored torque value corresponding to a current parametric value. The microprocessor adjusts the current parametric value if the retrieved torque value is lower than the stored torque value.

Abstract: The present invention provides a computer system operable by users of either handedness. The computer system includes a mouse and a computer connected together by interfaces. The mouse generates a mode-setting signal by a mode shift unit shifting between two selectable positions. The computer includes: a storage unit configured for storing a current operation mode of the mouse; a mouse interface configured for connecting the computer to the mouse and receiving the mode-shifting signal from the mouse; a driver unit configured for converting the mode-setting signal into a mode-shifting signal into a format which can be recognized by a central processing unit (CPU) of the computer; and a controller configured for updating the current operation mode in the storage unit from one of the left-handed operation mode and the right-handed mode to another of the two modes.

Abstract: A method for operating the mouse adapted for right-handed or left-handed includes storing a default operation mode and a current operation mode of the mouse; generating button signals according to click operations exerted on buttons of the mouse; obtaining the current operation mode and the default operation mode; changing the button signals on condition that the default operation mode is different from the current operation mode; and sending the changed button signals to an external computer. A mouse adapted for use by either right-handed or left-handed persons is also provided.

Abstract: A portable electronic device for mapping and displaying route information includes a route generator, a length calculator, a travel time calculator, and a display system. The route generator is configured for generating a route between a starting location and a destination based on predetermined mapping data. The length calculator is configured for determining a length of the route based on the predetermined mapping data. The travel time calculator is configured for determining a travel time based on a speed of the portable electronic device and the length. The display system is configured for displaying the route and the travel time for guiding a user to the destination. A related travel time forecast method is also provided.

Abstract: A method for managing access authorization of peripherals of an electronic apparatus is provided. The method includes the step of: providing a data storage for storing a peripheral registry table which stores hardware IDs of the peripherals; reading the hardware ID of the peripheral when the peripheral is connected to the electronic apparatus; determining whether the hardware ID is recorded in the peripheral registry table; activating an access of the peripheral when the hardware ID is recorded in the peripheral registry table; and registering the hardware ID of the peripheral into the peripheral registry table when the hardware ID is not recorded in the peripheral registry table.

Abstract: A constant-on-time power-supply controller includes an adder and a control circuit. The adder generates a sum of a sense voltage and a regulated output voltage generated by a filter inductor. The sense voltage is generated by a sense circuit that sources a current to the filter inductor while the inductor is uncoupled from an input voltage, and the sense voltage is related to the current. The control circuit couples the filter inductor to the input voltage for a predetermined time in response to the sum having a predetermined relationship to a reference voltage. Such a power-supply controller may yield a relatively tight regulation of the output voltage even with a power supply having with a low-ESR filter capacitor, and may do so with little or no additional compensation circuitry as compared to prior controllers and with no additional pin on the power-supply-controller chip.

Abstract: A security protection method used in a portable electronic device is provided. The portable electronic device provides an ID table for recording IDs of external electronic devices that are allowed to access the portable electronic device. The method includes: obtaining an ID of an external electronic device when the external electronic device is connected to the portable electronic device; determining whether the obtained ID exists in the ID table; and allowing the connected external electronic device to access the portable electronic device when the obtained ID exists in the ID table. A portable electronic device used the method is also provided.

Abstract: A constant-on-time power-supply controller includes an adder and a control circuit. The adder generates a sum of a sense voltage and a regulated output voltage generated by a filter inductor. The sense voltage is generated by a sense circuit that sources a current to the filter inductor while the inductor is uncoupled from an input voltage, and the sense voltage is related to the current. The control circuit couples the filter inductor to the input voltage for a predetermined time in response to the sum having a predetermined relationship to a reference voltage. Such a power-supply controller may yield a relatively tight regulation of the output voltage even with a power supply having with a low-ESR filter capacitor, and may do so with little or no additional compensation circuitry as compared to prior controllers and with no additional pin on the power-supply-controller chip.

Abstract: A system of supplying power between portable devices includes a power providing portable device and a power receiving portable device. The power providing portable device includes a rechargeable battery, a voltage regulator, a voltage selector, and an output port. The voltage regulator is used for regulating output voltage from the rechargeable battery according to the voltage selector and transmitting the power via the output port to the power receiving portable device. The power receiving portable device includes an input port for receiving power from the providing device and transmitting power to a rechargeable battery of the receiving device. A portable device used in the system for either receiving or supplying power is also disclosed in the invention.

Abstract: An audio player capable of allowing multiple persons to listen to different multimedia files simultaneously is provided. The audio player includes a processing unit and a plurality of output channels. Each of the output channels is configured for outputting multimedia files. Each of the output channels includes a codec, an amplifier, and an audio output port. The amplifier is connected to the codec and the audio output port. The processing unit is connected with the output channels. The processing unit is configured for establishing a plurality of processes and for controlling performance of the processes according to time division multiplexing (TDM) technology. Wherein, each of the processes is configured for playing multimedia files and is assigned with one of the output channels for outputting the multimedia files.

Abstract: A system for inspecting a liquid crystal display (LCD) panel (10) includes a magnifier (11) for magnifying an image of the inspected LCD panel, a charge coupled device (CCD) camera (12) for capturing the magnified image of the inspected LCD panel, an image acquisition card (13) for converting analog signals of the magnified image into digital signals, and a computer (14). The computer is for obtaining color template intervals based on a statistical theory, rotating the magnified image when necessary, obtaining transverse mask codes and longitudinal mask codes of magnified image pixels, obtaining a color transverse mask code matrix of sub-pixels of the inspected LCD panel, and determining whether the sub-pixels of the inspected LCD panel are defective according to the color transverse mask matrix. A related method for inspecting an LCD is also provided.

Abstract: An invention of switching capacitor network auxiliary voltage source for IC chip solution and additional function circuits is provided. The solution can convert the high DC bus voltage into the low DC voltage in low cost and in high efficiency. The auxiliary voltage is independent of the power converter system duty-cycle.