摘要:
An analog-to-digital conversion apparatus has a plurality of comparators configured to compare each of a plurality of different reference voltages and an input signal voltage in a parallel manner, a switch unit configured to switch the input signal voltage to a voltage corresponding to an analog input signal voltage or one of the plurality of reference voltages, an encoder configured to convert comparison results of the plurality of comparators into digital signals, and a digital assist circuit configured to control the switch unit so that the input signal voltage has a potential corresponding to the reference voltage in the comparator being the correction target among the plurality of comparators, to generate correction data for correcting the offset voltage generated in the comparator being the correction target based on the digital signal and to output it to the comparator being the correction target.
摘要:
A semiconductor light emitting device includes: a base portion having a concave portion formed in one of major surfaces thereof; and a light emitting element mounted on a bottom surface of the concave portion of the base portion. The base portion comprises a side wall portion that surrounds the light emitting element. The light emitting element is covered with a resin portion filled in the concave portion. At least a part of an upper surface of the resin portion is positioned closer to the bottom surface of the concave portion than an upper surface of the side wall portion.
摘要:
A semiconductor light emitting device includes: a package base having recesses which are open in a light irradiating direction; a plurality of light emitting elements arranged on bottoms of the recesses and emitting light having different colors; first light transmitting resin extending over the light emitting elements on the bottoms of the recesses and containing a fluorescent substance; and second light transmitting resin extending over the first transmitting resin in the recesses and oriented toward openings of the recesses, containing a fewer fluorescent substance than the fluorescent substance of the first light transmitting resin, and being thicker than the first light transmitting resin.