Texas Instruments Corporation

James Henry Aliberti

Brant T Johnson

A system can include a processing core to execute machine readable instructions. The system can also include a memory accessible by the processor core. The memory can include preprogrammed test data that characterizes one of an impedance of a processor and a current output to the processor during execution of a test routine. The processor can include the processing core and the one of the impedance of the processor and the current output to the processor is based on a power measurement taken during execution of a test routine. The power measurement can be taken with a current sensor that is at least one of lossy or at least about 98% accurate.

Processor power measurement

Apparatus and methods separate the functions of light emission, heat dissipation, and power conversion in LED lighting. Doing so may facilitate cost-effective LED lighting and enable the conversion of existing incandescent lamps to LED service. An LED light bulb includes a thermal path from LED dies to a thermal transfer contact having an externally available surface. The LED light bulb and an incandescent lamp adapter are consumer-installable in an incandescent lamp. A heat spreader component of the lamp adapter contacts the thermal transfer contact of the LED light bulb to dissipate heat originating at the LED dies. A lamp adaptable LED power supply plugs into a standard AC power outlet and includes a receptacle to accept insertion of a lamp cord plug to deliver power to the LED light bulb. A lock-in safety device prevents retraction of the lamp cord plug from the LED power supply once inserted.

Light emitting diode light bulb and incandescent lamp conversion apparatus

A current source generates, with high efficiency, a current that is substantially constant over a wide range of output voltages. This current is injected into the first end of a series-connected string of LEDs, with the second end of the string connected through a resistor to ground. The voltage developed across this resistor, which is a measure of current flow in the series string, is fed back to the current source, wherein feedback maintains nearly constant current output over a wide range of output voltages. A field effect transistor (FET) is placed in parallel with each LED in the string. A level shift gate driver couples a pulse width modulated control signal to the gate of each FET. With the FET being coupled across a particular LED, the LED can be bypassed when the FET is actuated or receive current when the FET is deactuated. By modulating the duty cycle of each FET, the brightness of each associated LED may be varied smoothly over its full range.

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North Attleboro, MA, United States of America

James Henry Aliberti