Abstract:
PROBLEM TO BE SOLVED: To provide an improved LED drive circuit and method for illumination.SOLUTION: A fly-back type switched current regulator includes a primary transformer winding coupled to receive a rectified DC signal derived from an AC signal. A drain of a power transistor is coupled to the primary winding, and a source of the power transistor is coupled to an input of a comparison circuit and a primary transformer winding sense resistor. A control terminal of the power transistor is coupled to an output of the comparison circuit. A capacitor stores a variable reference signal for application at a first capacitor terminal to another input of the differential circuit. The variable reference signal is compared with a winding current signal generated by the sense resistor by the comparison circuit. An injection circuit applies an AC signal derived from the rectified DC signal to a second terminal of the capacitor so as to modulate the stored variable reference signal. The regulator is coupled to drive LEDs.
Abstract:
PROBLEM TO BE SOLVED: To provide improved system and method for a power line modem.SOLUTION: In accordance with one embodiment, a method of operating an electronic system includes: detecting an incoming transmission on a power line; and correcting a switching action of a switching mode power supply bonded with the power line when the incoming transmission is detected. The correcting reduces level of interference generated by the switching mode power supply.
Abstract:
PROBLEM TO BE SOLVED: To provide improved techniques for metal interconnection within an integrated circuit die.SOLUTION: A plurality of metal tracks are formed in three metal layers stacked in an integrated circuit die. A protective dielectric layer is formed around the metal tracks of an intermediate metal layer. The protective dielectric layer acts as a hard mask to define contact vias between the metal tracks in the metal layers above and below the intermediate metal layer.
Abstract:
PROBLEM TO BE SOLVED: To provide a multi-fin FINFET device which is reliable and easy to manufacture, and a method for manufacturing the same.SOLUTION: A multi-fin FINFET device may have a substrate and a plurality of semiconductor fins extending upward from the substrate and isolated along the substrate. Each of the semiconductor fins may have first and second ends on both sides and an intermediate part therebetween, and an outermost fin among the plurality of semiconductor fins may have an epitaxial growth barrier on its outer surface. The FINFET further may have at least one gate above the intermediate part of the semiconductor fin, a plurality of swell type epitaxial semiconductor source regions adjacent to a first end thereof and between semiconductor fins, and a plurality of swell type epitaxial semiconductor drain regions adjacent to a second end thereof and between semiconductor fins.
Abstract:
PROBLEM TO BE SOLVED: To provide a semiconductor device whose contact resistance is reduced, and a method thereof.SOLUTION: A semiconductor device includes a semiconductor substrate comprising a channel region, a gate component above the channel region, and source and drain regions on both sides of the gate component. Contacts are respectively provided on the source and drain regions. At least one of the source and drain regions is provided with a gradient type upper contact surface with the respective contacts. The gradient type upper contact surface has an area at least 50% larger than that of a corresponding flat contact surface.