Abstract: A buck converter supplies a drive current to a light source and is feedback-controlled so that the drive current comes close to a target current. An open-circuit detection circuit compares a potential difference between and input voltage and an output voltage of the buck converter with a threshold voltage.

Abstract: A linear light-emitting diode (LED) lamp comprising a housing, two lamp bases at two ends of the housing, a full-wave rectifier, an LED driving circuit, LED arrays, two displacement sensors, and two pairs of electrical contacts controlled by the two displacement sensors, is used to replace a fluorescent tube or a conventional LED tube lamp. The two displacement sensors and the two pairs of electrical contacts are configured to respectively perform position sensing for electric shock hazards. The two pairs of electrical contacts are operated by using a low direct current (DC) voltage supplied by a power sustaining device. When both two lamp bases are inserted in the two sockets, the two pairs of electrical contacts are driven to make an electric connection from the power sustaining device to a low voltage input of the LED driving circuit and to power the LED driving circuit.

Abstract: An integrated circuit may have pipelined interconnects that are configurable to operate in registered single data rate mode, registered double data rate mode, or in combinational mode. The pipelined interconnect may include routing multiplexers for selecting incoming signals, circuitry for serialization and de-serialization, and memory elements that are configurable to store one or two signals per clock period. Operating the pipeline interconnects in double data rate mode may provide a trade-off between reducing the number of physical wires that are required to implement a design at a constant bandwidth or increasing the bandwidth while keeping the number of physical wires constant.

Abstract: A linear light-emitting diode (LED)-based tube (LLT) lamp comprises a pulse amplitude control module, a power sustaining device, an LED driving circuit, and LED arrays. The pulse amplitude control module is configured to generate one or more voltage pulses in each alternate-current (AC) cycle in response to a half-wave direct-current (DC) voltage when the LLT lamp starts to receive power from an input AC line voltage and when the half-wave DC voltage drops to a few tens of volts in each AC cycle. The power sustaining device receives the one or more voltage pulses and builds up a DC voltage depending on pulse amplitudes. When an electric shock occurs, the DC voltage built up is not high enough to operate the LED driving circuit and thus to disable the LED arrays, without electric shock current leaking into an electrical conductor of the LLT lamp during relamping or maintenance.

Abstract: A semiconductor device using a programming unit with is provided. A highly reliable semiconductor device using the programming unit is provided. A highly integrated semiconductor device using the programming unit is provided. In a semiconductor circuit having a function of changing a structure of connections between logic cells such as PLDs, connection and disconnection between the logic cells or power supply to the logic cells is controlled by a programming unit using an insulated gate field-effect transistor with a small amount of off-state current or leakage current. A transfer gate circuit may be provided in the programming unit. To lower driving voltage, a capacitor may be provided in the programming unit and the potential of the capacitor may be changed during configuration and during operation.

Abstract: A power factor correction circuit, and methods of operation, is described, that can downconvert AC mains power to a lower power suitable for driving one or more LEDs. The power factor correction circuit can provide a regulated current, in a single-stage embodiment, and a regulated voltage, in a dual-stage embodiment. The power factor correction circuit can include an isolation transformer along with a switch for controlling downconversion. The power factor correction circuit can alternatively include a switch without isolation. Either way, the switch can have a duty cycle proportional to a desired downconversion from the AC mains signal, and can skip half cycles of the AC mains signal in order to reduce the downconverted output of the power factor correction circuit.

Abstract: An LED lamp, comprising a first full-wave rectifier, a ballast operation circuit, an LED driving circuit, LED array(s), and an optocoupler, replaces a fluorescent tube or a conventional LED tube lamp in lamp fixture sockets that are wired to connect to either AC mains or a ballast. The ballast operation circuit, comprising two frequency sensitive devices, a second full-wave rectifier, and two or more diodes connected in series, auto-selects an input AC voltage to operate the LED lamp without ambiguity and safety issues. When the input AC voltage is from the ballast, the optocoupler is enabled to disable the LED driving circuit, whereas the LED array(s) are powered by the second full-wave rectifier. When the input AC voltage is from the AC mains, the optocoupler is disabled to maneuver the LED driving circuit, whereas the LED array(s) are operated by the LED driving circuit, pre-powered by the first full-wave rectifier.

Abstract: An integrated circuit includes programmable circuits, a configuration status register circuit, a mode register circuit, a mode decoder circuit, and a multiplexer circuit. The configuration status register circuit stores configuration bits and is coupled to provide the configuration bits to the programmable circuits to program the programmable circuits to implement functions of a first mode. The mode register circuit is coupled to store mode bits. The mode decoder circuit decodes at least a subset of the mode bits received from the mode register circuit to generate decoded bits. The multiplexer circuit is coupled to provide the decoded bits from the mode decoder circuit to the programmable circuits to reprogram the programmable circuits to implement functions of a second mode.

Abstract: An LED luminaire comprises a rechargeable battery, LED array(s), multiple drivers, and a control circuit. The LED luminaire may be used to replace a fluorescent or a conventional LED lamp connected to AC mains. The multiple drivers comprise a first driver configured to charge the rechargeable battery, a second driver configured to convert a DC voltage from the rechargeable battery to light up the LED array(s) when a line voltage from the AC mains is unavailable, and a third driver configured to operate the LED array(s) when the line voltage from the AC mains is available. The control circuit is configured to manage the multiple drivers in a way that the second driver is disabled when the line voltage from the AC mains is available and that the first driver and the third driver are disabled when a rechargeable battery test is performed, without ambiguity and safety issues.

Abstract: The present invention relates to a look-up table architecture and to an FPGA comprising the same. The look-up table architecture comprises a registers group comprising a plurality of registers configured to issue register signals, and a programmable logic comprising a plurality of pass gates configured to be controlled at least by the register signals, the registers group and the programmable logic forming a look-up table, wherein the pass gates are placed in a single direction.

Abstract: In one example, a method includes determining, by a device of a system, a voltage feedback value that represents a voltage level of a power signal being provided to a plurality of load elements that are selectively active. In this example, the method also includes adjusting, by the device and based on a quantity of load elements of the plurality of load elements that are active, the voltage level of the power signal such that the voltage feedback value remains less than or equal to an overvoltage threshold.

Abstract: An LED drive method drives an LED by a drive current. The LED drive method uses a voltage conversion unit, which includes a coil and a first switch, and converts an external voltage into a first voltage, which is a DC voltage, by controlling the first switch to be on in an on-pulse period of a first drive signal. A constant current drive unit is provided with the first voltage and generates a drive current based on a second drive signal.

Abstract: Disclosed are a latch circuit and method for preventing double node upsets (DNUs). A first, second, and third storage circuit, each comprising four inputs and an output, are electrically interconnected with a first and second three-input c-element circuit, each comprising three inputs and an output, and a two-input c-element circuit comprising two inputs and an output. The output of the first storage circuit is connected to a first input of the first three-input c-element circuit, a first input of the third storage circuit and a third input of the second storage circuit. The output of the second storage circuit is connected to a second input of the first three-input c-element circuit, a first input of the two-input c-element circuit, and a second input of the second three-input c-element circuit.

Abstract: This disclosure relates in general to a networked light switch. More specifically, the disclosure relates to a light switch that, in response to detecting a local input or motion, transmits a communication that causes another light switch to change a state of a light. This disclosure further relates to techniques for detecting an abnormal current draw state of an electrical device such as a lighting device are described; systems including in-wall network devices having a user-facing restore button for restoring some or all of the customizable settings to a factory default state; and techniques for controlling device operations in accordance with scenes or modes.

Abstract: A field-programmable analog array including an array of a plurality of programmable analog timing circuits, the field-programmable analog array being field-programmable to a plurality of analog or analog-to-digital conversion circuits, such as relaxation oscillators, phase shifters, phase interpolators, pulse width modulators, pseudo exponential digitally controlled oscillators, etc. through programming, without physical re-processing of circuit.

Abstract: Disclosed is a CMOS inverter, including a first selector, a second selector, and a first transistor, a second transistor, a third transistor and a fourth transistor, which respectively are coupled to the input end of the CMOS inverter through the gates, and all the first transistor, the second transistor, the third transistor and the fourth transistor are coupled to the output end of the CMOS inverter, and sources of the first, the third transistors are respectively and correspondingly coupled to a first output end and a second output end of the first selector, and sources of the second, the fourth transistors are respectively and correspondingly coupled to a first output end and a second output end of the second selector; both the first selector and the second selector receive a first control signal and a second control signal, and both are coupled to the input end.

Abstract: A linear light-emitting diode (LED) lamp comprising a housing, two lamp bases at two ends of the housing, a full-wave rectifier, an LED driving circuit, one or more LED arrays, at least two proximity sensors, and at least two pairs of electrical contacts controlled by the at least two proximity sensors, is used to replace a fluorescent tube or a conventional LED tube lamp. The at least two proximity sensors and the at least two pairs of electrical contacts configured to respectively perform proximity sensing between the two lamp bases and two sockets in an existing lamp fixture are operated by using a low DC voltage. When both two lamp bases are inserted in the two sockets, the at least two pairs of electrical contacts are driven to make an electrical coupling between the full-wave rectifier and the LED driving circuit.

Abstract: A control circuit of power gating of the present disclosure includes a control section that controls whether to perform power gating depending on a level of a clock signal for a logic circuit supplied with a power supply voltage through a power switch transistor, on the basis of a clock frequency of the clock signal.

Abstract: Various structures and methods are disclosed related to routing and programming circuitry on integrated circuits (“IC”) that have arrays of programmable resistive switches. In some embodiments, routing structures utilize densely populated resistive switch arrays to provide for efficient selection circuits that route into and out of logic regions. In other embodiments, programming circuitry is provided to help maintain relatively consistent programming current throughout an array of resistive switches to be programmed. In other embodiments, methods are provided for programming resistive switches without violating given power constraints. These and other embodiments are described further herein.

Abstract: This disclosure relates in general to a networked light switch. More specifically, the disclosure relates to a light switch that, in response to detecting a local input or motion, transmits a communication that causes another light switch to change a state of a light. This disclosure further relates to techniques for detecting an abnormal current draw state of an electrical device such as a lighting device are described; systems including in-wall network devices having a user-facing restore button for restoring some or all of the customizable settings to a factory default state; and techniques for controlling device operations in accordance with scenes or modes.