Abstract: A bipolar transistor includes a collector layer, a base layer, and an emitter layer that are formed in this order on a compound semiconductor substrate. The emitter layer is disposed inside an edge of the base layer in plan view. A base electrode is disposed on partial regions of the emitter layer and the base layer so as to extend from an inside of the emitter layer to an outside of the base layer in plan view. An insulating film is disposed between the base electrode and a portion of the base layer, with the portion not overlapping the emitter layer. An alloy layer extends from the base electrode through the emitter layer in a thickness direction and reaches the base layer. The alloy layer contains at least one element constituting the base electrode and elements constituting the emitter layer and the base layer.

Abstract: To provide a controller and an information processing system capable of providing a click feeling and an operation sound with a simpler mechanism. The controller includes a hollow portion, a freely movable first magnet placed in the hollow portion, a second magnet fixed to an outer side of the hollow portion, and a bottom surface having a tilted shape with respect to a ground surface.

Abstract: A power amplifier module includes an amplifier transistor and a bias circuit. A first power supply voltage based on a first operation mode or a second power supply voltage based on a second operation mode is supplied to the amplifier transistor. The amplifier transistor receives a first signal and outputs a second signal obtained by amplifying the first signal. The bias circuit supplies a bias current to the amplifier transistor. The bias circuit includes first and second resistors and first and second transistors. The first transistor is connected in series with the first resistor and is turned ON by a first bias control voltage which is supplied when the first operation mode is used. The second transistor is connected in series with the second resistor and is turned ON by a second bias control voltage which is supplied when the second operation mode is used.

Abstract: A bipolar transistor includes a collector layer, a base layer, and an emitter layer that are formed in this order on a compound semiconductor substrate. The emitter layer is disposed inside an edge of the base layer in plan view. A base electrode is disposed on partial regions of the emitter layer and the base layer so as to extend from an inside of the emitter layer to an outside of the base layer in plan view. An insulating film is disposed between the base electrode and a portion of the base layer, with the portion not overlapping the emitter layer. An alloy layer extends from the base electrode through the emitter layer in a thickness direction and reaches the base layer. The alloy layer contains at least one element constituting the base electrode and elements constituting the emitter layer and the base layer.

Abstract: A power amplifier including a first transistor for amplifying and outputting a radio frequency signal, a second transistor, a third transistor for supplying a bias current, a first voltage supply circuit for supplying a lower voltage to a base of the third transistor as a temperature of a first diode is higher. The third transistor and the first transistor, or the third transistor and the second transistor, are disposed without another electronic element interposed therebetween. The third transistor is disposed such that a distance between the third transistor and the first transistor is smaller than a distance between the first voltage supply circuit and the first transistor, or a distance between the third transistor and the second transistor is smaller than a distance between the first voltage supply circuit and the second transistor.

Abstract: A power amplifier module includes an amplifier transistor and a bias circuit. A first power supply voltage based on a first operation mode or a second power supply voltage based on a second operation mode is supplied to the amplifier transistor. The amplifier transistor receives a first signal and outputs a second signal obtained by amplifying the first signal. The bias circuit supplies a bias current to the amplifier transistor. The bias circuit includes first and second resistors and first and second transistors. The first transistor is connected in series with the first resistor and is turned ON by a first bias control voltage which is supplied when the first operation mode is used. The second transistor is connected in series with the second resistor and is turned ON by a second bias control voltage which is supplied when the second operation mode is used.

Abstract: The present technology relates to a control apparatus, a control method, a program, and a projection system capable of conveying information in space more intuitively. The control apparatus according to one aspect of the present technology is an apparatus that acquires space sensing data regarding an object in a space obtained by sensing the space, acquires external environment data obtained by sensing an external environment, determines an image corresponding to the object on the basis of the space sensing data, and controls to project the image to which an effect corresponding to the external environment data has been added, onto the space. The present technology can be applied to a system that controls to project an image from a projector and presents information.

Abstract: The present technology relates to a control device, a method for control, a program, and a projection system that enable to, in a case where input information is to be presented by projecting an image, naturally attract the attention of a person around a projection surface. A control device of an aspect of the present technology projects an image representing input information onto a projection surface so as to follow an input of the input information, with an effect in accordance with the type of the projection surface. As the projection surface, a thin sheet material attached on a wall surface is prepared, for example. The color of the thin sheet material is a dark color, for example, and in time with projection of the image representing a handwritten character or picture, a sound, which will come out when the character or the picture is drawn with a chalk on a chalkboard, is output from a speaker installed on the back side of the projection surface.

Abstract: To provide an information processing device, information processing method, and program that make it possible to improve convenience at the time of operation with regard to an operation target. The information processing device includes: an operation target selecting section that cancels a selected state of a target selected as an operation target on a basis of detection of a posture of an object; and a lock control section that changes a condition for cancelling the selected state on a basis of a predetermined determination criterion.

Abstract: An information processing apparatus includes a connection unit, a processing execution unit, a setting unit, and a controller. The connection unit is capable of connecting input apparatuses that output operation information for executing an operation for an image displayed on a screen. The processing execution unit is capable of executing processing corresponding to the operation information on the image. The setting unit sets one of the input apparatuses as a main input apparatus, and sets the other input apparatuses as secondary input apparatuses. The controller performs control such that execution of the processing for the image by the processing execution unit based on the operation information from the input apparatus set as the main input apparatus is validated, and execution of the processing for the image by the processing execution unit based on the operation information from the input apparatuses set as the secondary input apparatuses is invalidated.

Abstract: A power amplifier circuit includes a first transistor that amplifies a first signal and outputs a second signal; a second transistor that amplifies the second signal and outputs a third signal; a bias circuit that supplies a bias current to a base of the second transistor; and a bias adjustment circuit that adjusts the bias current to be supplied by the bias circuit by subjecting the first signal to detection. The bias adjustment circuit controls the bias current to be supplied to the base of the second transistor by drawing, from the bias circuit, a current of a magnitude corresponding to a magnitude of the first signal. The current increases as the magnitude of the first signal increases.

Abstract: Provided is an information processing apparatus including an operation detection unit configured to detect a user's operation, and a display control unit configured to display content in a part including a middle of a display screen and display thumbnails corresponding to content belonging to one category in one direction along one side of the display screen in a region located separately from the middle of the display screen. The display control unit moves the displayed thumbnails in a vertical direction with respect to the one direction according to an operation which is detected by the operation detection unit and is an operation of switching the one category to which the content corresponding to the displayed thumbnails belongs.

Abstract: A semiconductor chip includes an active element on a first surface of a substrate. A heat-conductive film having a higher thermal conductivity than the substrate is disposed at a position different from a position of the active element. An insulating film covering the active element and heat-conductive film is disposed on the first surface. A bump electrically connected to the heat-conductive film is disposed on the insulating film. A via-hole extends from a second surface opposite to the first surface to the heat-conductive film. A heat-conductive member having a higher thermal conductivity than the substrate is continuously disposed from a region of the second surface overlapping the active element in plan view to an inner surface of the via-hole. The bump is connected to a land of a printed circuit board facing the first surface. The semiconductor chip is sealed with a resin.

Abstract: A swing bearing allows a reduction in thickness, weight, and manufacturing cost by means of fixing together a pair of split rings each formed of a plate member to form an outer ring, and fixing together a pair of split rings each formed of a plate member to form an inner ring. The outer ring is composed of a pair of split rings which are obtained by splitting the outer ring at an axially midpoint of the first raceway groove, are formed of respective plate members, and are fixed together. The inner ring is composed of a pair of split rings which are obtained by splitting the inner ring at an axially midpoint of the second raceway groove, are formed of respective plate members, and are fixed together. The split rings of the outer ring and the split rings of the inner ring are formed by press working on the respective plate members having predetermined thicknesses, respectively.

Abstract: An information processing apparatus, method, and program are provided that control display of an image. The information processing apparatus, method, and program designate a first point and a second point on an image, determine a zoom direction based on a position of the first point relative to a position of the second point, and zoom the image in the zoom direction.

Abstract: An information processing apparatus includes a connection unit, a processing execution unit, a setting unit, and a controller. The connection unit is capable of connecting input apparatuses that output operation information for executing an operation for an image displayed on a screen. The processing execution unit is capable of executing processing corresponding to the operation information on the image. The setting unit sets one of the input apparatuses as a main input apparatus, and sets the other input apparatuses as secondary input apparatuses. The controller performs control such that execution of the processing for the image by the processing execution unit based on the operation information from the input apparatus set as the main input apparatus is validated, and execution of the processing for the image by the processing execution unit based on the operation information from the input apparatuses set as the secondary input apparatuses is invalidated.

Abstract: Provided is an information processing apparatus including an operation detection unit configured to detect a user's operation, and a display control unit configured to display content in a part including a middle of a display screen and display thumbnails corresponding to content belonging to one category in one direction along one side of the display screen in a region located separately from the middle of the display screen. The display control unit moves the displayed thumbnails in a vertical direction with respect to the one direction according to an operation which is detected by the operation detection unit and is an operation of switching the one category to which the content corresponding to the displayed thumbnails belongs.

Abstract: Provided is an information processing apparatus including an operation detection unit configured to detect a user's operation, and a display control unit configured to display content in a part including a middle of a display screen and display thumbnails corresponding to content belonging to one category in one direction along one side of the display screen in a region located separately from the middle of the display screen. The display control unit moves the displayed thumbnails in a vertical direction with respect to the one direction according to an operation which is detected by the operation detection unit and is an operation of switching the one category to which the content corresponding to the displayed thumbnails belongs.

Abstract: A transmission unit includes a first transistor that amplifies power of a first signal and outputs a second signal, a power supply circuit that supplies to the first transistor a power supply voltage that changes in accordance with an amplitude level of the first signal, and an attenuator that attenuates the first signal in such a manner that an amount of attenuation of the first signal increases with a decrease in the power supply voltage when the power supply voltage is less than a first level.

Abstract: A power amplifier circuit includes a first transistor amplifying a first signal; a second transistor amplifying a second signal; a bias circuit supplying a bias current or voltage to a base or gate of the second transistor; and an attenuator attenuating the first or second signal in accordance with a control voltage supplied from the bias circuit. The attenuator includes a first diode to which the control voltage is supplied, a third transistor including a collector connected to a supply path of the first or second signal, an emitter connected to a ground, and a base to which the control voltage is supplied from the first diode, and a capacitor connected in parallel with the first diode. The control voltage decreases as a second signal power level increases. The third transistor allows part of the first or second signal to pass to the emitter in accordance with the control voltage.