摘要:
In a radio communication system, an electronic component for high frequency power amplifier carries out the detection of output level, required for feedback control of the output power of a high frequency power amplification circuit, by current detection. The electronic component has an error amplifier. The error amplifier compares an output level detection signal with an output level instruction signal, and generates a signal for controlling the gain of the high frequency power amplification circuit according to the difference between them. For the error amplifier, a low-pass amplification circuit is used. The amplification circuit is provided with, between its output terminal and its inverting input terminal, a phase compensation circuit. The phase compensation circuit comprises a resistance element, and another resistance element and a capacitive element in series connected in parallel with the resistance element.
摘要:
In a radio communication system, an electronic component for high frequency power amplifier carries out the detection of output level, required for feedback control of the output power of a high frequency power amplification circuit, by current detection. The electronic component has an error amplifier. The error amplifier compares an output level detection signal with an output level instruction signal, and generates a signal for controlling the gain of the high frequency power amplification circuit according to the difference between them. For the error amplifier, a low-pass amplification circuit is used. The amplification circuit is provided with, between its output terminal and its inverting input terminal, a phase compensation circuit. The phase compensation circuit comprises a resistance element, and another resistance element and a capacitive element in series connected in parallel with the resistance element.
摘要:
In a radio communication system, an electronic component for high frequency power amplifier carries out the detection of output level, required for feedback control of the output power of a high frequency power amplification circuit, by current detection. The electronic component has an error amplifier. The error amplifier compares an output level detection signal with an output level instruction signal, and generates a signal for controlling the gain of the high frequency power amplification circuit according to the difference between them. For the error amplifier, a low-pass amplification circuit is used. The amplification circuit is provided with, between its output terminal and its inverting input terminal, a phase compensation circuit. The phase compensation circuit comprises a resistance element, and another resistance element and a capacitive element in series connected in parallel with the resistance element.
摘要:
According to one embodiment, a semiconductor light emitting device includes a stacked structure body, first and second electrodes. The stacked structure body includes first and second semiconductor layers and a light emitting layer provided between the second and first semiconductor layers, and has first and second major surfaces. The first electrode has a first contact part coming into contact with the first semiconductor layer. The second electrode has a part coming into contact with the second semiconductor layer. A surface of the first semiconductor layer on a side of the first major surface has a first part having a part overlapping a contact surface with the first semiconductor layer and a second part having a part overlapping the second semiconductor layer. The second part has irregularity. A pitch of the irregularity is longer than a peak wavelength of emission light. The first part has smaller irregularity than the second part.
摘要:
An automotive wheel includes a wheel disc in which a hat section is provided outside a hub mounting section. A hat inner inclined surrounding section of the hat section includes an inner convex surrounding section protruding to a surface side in a curved shape, and an inner lower concave surrounding section continuously formed with an inner peripheral edge of the inner convex surrounding section, continuously formed with an outer peripheral edge of a hub surface rounded section, and protruding to the back side in a curved shape.
摘要:
According to one embodiment, a semiconductor light-emitting device includes a first semiconductor layer, a second semiconductor layer, a light-emitting layer, a third semiconductor layer and a first electrode. The first semiconductor layer of a first conductivity type has a first major surface provided with a first surface asperity. The second semiconductor layer of a second conductivity type is provided on an opposite side of the first semiconductor layer from the first major surface. The light-emitting layer is provided between the first and second semiconductor layers. The first semiconductor layer is disposed between a third semiconductor layer and the light-emitting layer. The third semiconductor layer has an impurity concentration lower than an impurity concentration of the first semiconductor layer, and includes an opening exposing the first surface asperity. The first electrode is in contact with the first surface asperity through the opening, and reflective to emission light emitted from the light-emitting layer.
摘要:
A retractable vehicle seat in which a seat main body disposed on a vehicle floor is flipped up laterally, so as to be retracted in a vehicle interior side wall of which the upper portion is inwardly inclined, may include a connection mechanism that is configured to rotatably connect the seat main body to a support stand. The connection mechanism includes a four-link mechanism having a stationary link integral with the support stand, an intermediate link integral with the seat main body, and a first link and a second link that connect these two links. The second link is configured to increase an angle between the first link and the intermediate link as the seat main body is flipped up.
摘要:
According to one embodiment, a semiconductor light emitting device includes first and second electrodes, first and second semiconductor layers and a light emitting layer. The first electrode includes a first region, a second region, and a third region provided between them. The first semiconductor layer includes a first portion on the first region and a second portion on the second region. The light emitting layer includes a third portion on the first portion and a fourth portion on the second portion. The second semiconductor layer includes a fifth portion on the third portion and a sixth portion on the fourth portion. The insulating layer is provided between the first and second portions on the third region and between the third and fourth portions. The second electrode includes a seventh portion provided on the insulating layer, eighth and ninth portions contacting side surfaces of the fifth and sixth portions.
摘要:
The in-vehicle indoor illumination apparatus which includes a design section, a functional section that is engaged with the design section, and a connector that is inserted to the functional section in a removable manner, wherein an interposition holder of the functional section is provided with two locking frames erected upward from a base housing of the design section at an interval and having resilience, and two locking hooks each engaged with the two locking frames of the design section from outside the two locking frames when the functional section is engaged with the design section, and a section between the two second locking frames is a connector insertion hole into which a housing of the connector is inserted.
摘要:
A fixing structure of an indoor lamp includes a lamp unit and an interior wall member. The lamp unit includes a design part arranged at an indoor side of the interior wall member and a functional part arranged at an outdoor side of the interior wall member and assembled with the design part through a lamp attachment hole in a state that the functional part holds the interior wall member therebetween. The functional part has a connector portion for connecting a connector. The design part has a regulating portion which forms a connector insertion portion together with the connector portion when the design part is assembled with the functional part. The regulating portion engages with the connector inserted into the connector insertion portion to regulate displacement of the design part in a disengagement direction from the functional part.