Abstract: A radio-frequency module includes a power amplifier, a first bias circuit connected to the power amplifier, and a second bias circuit connected to the power amplifier. The first bias circuit includes a register that receives a first digital control signal corresponding to a power mode of the power amplifier and a current generation circuit that generates, based on information in the register, a first bias current, and the second bias circuit includes another register that receives a second digital control signal corresponding to the power mode and a current generation circuit that generates, based on information in the other register, a second bias current.

Abstract: A radio frequency module includes a transmit filter of Band A and Band B, a transmit amplifier, and a switch circuit and can perform CA using a transmit signal of Band A and a receive signal of Band B, a transmit band of Band B including a receive band of Band C. The switch circuit includes a switch switching connection between a common terminal and a first selection terminal, a switch switching connection between the common terminal and a second selection terminal, and a switch switching connection between the second selection terminal and a third selection terminal. The common terminal is connected to the transmit amplifier. The first selection terminal is connected to the transmit filter of Band A. The second selection terminal is connected to the transmit filter of Band B. The third selection terminal is connected to a receive path of Band C.

Abstract: An integrated circuit includes a first base that has at least a part formed of a first semiconductor material and that, in plan view, has a central area and a peripheral area surrounding the central area, and a second base that has at least a part formed of a second semiconductor material different from the first semiconductor material and that includes a power amplifier circuit. In plan view, the second base is overlain by the central area, and does not overlap the peripheral area.

Abstract: A radio frequency module includes a transmit filter of Band A and Band B, a transmit amplifier, and a switch circuit and can perform CA using a transmit signal of Band A and a receive signal of Band B, a transmit band of Band B including a receive band of Band C. The switch circuit includes a switch switching connection between a common terminal and a first selection terminal, a switch switching connection between the common terminal and a second selection terminal, and a switch switching connection between the second selection terminal and a third selection terminal. The common terminal is connected to the transmit amplifier. The first selection terminal is connected to the transmit filter of Band A. The second selection terminal is connected to the transmit filter of Band B. The third selection terminal is connected to a receive path of Band C.

Abstract: A power amplifier circuit is provided that includes a transmission circuit, a control circuit, a first terminal, and a second terminal. The transmission circuit includes an amplifier element that amplifies power of a radio frequency signal. The control circuit controls the transmission circuit. The first terminal receives a serial data signal that is based on a serial data standard. The second terminal receives a digital signal different from the serial data signal. The control circuit then controls the transmission circuit in response to the digital signal received from the second terminal.

Abstract: A radio frequency module includes a transmit filter of Band A and Band B, a transmit amplifier, and a switch circuit and can perform CA using a transmit signal of Band A and a receive signal of Band B, a transmit band of Band B including a receive band of Band C. The switch circuit includes a switch switching connection between a common terminal and a first selection terminal, a switch switching connection between the common terminal and a second selection terminal, and a switch switching connection between the second selection terminal and a third selection terminal. The common terminal is connected to the transmit amplifier. The first selection terminal is connected to the transmit filter of Band A. The second selection terminal is connected to the transmit filter of Band B. The third selection terminal is connected to a receive path of Band C.

Abstract: An axial deviation detection device configured to detect axial deviation of a LIDAR system mounted on a vehicle is provided. The axial deviation detection device includes a storage device and a processor. The storage device stores reference plane information indicating a position of a reference plane, and LIDAR measurement information indicating positions of point clouds detected by the LIDAR system in a sensor coordinate system. The processor is configured to extract a road surface point cloud representing a road surface from the point clouds indicated in the LIDAR measurement information, approximate the road surface point cloud by an approximation plane and acquire the approximation plane as an estimated road plane, compare the estimated road plane with the reference plane indicated by the reference plane information, and determine that the axial deviation occurs when a deviation between the estimated road plane and the reference plane is larger than a threshold.

Abstract: A vehicle localization system includes: an electronic control unit estimating a vehicle position including a longitudinal position on a map in an extension direction of a road on which the vehicle is traveling and a lateral position on the map in a lateral direction of the road; and a storage device storing a map database including map information. The electronic control unit obtains a vehicle speed and a pitch angle of the vehicle, perceives a measured position of the vehicle on the map based on a measurement result of a positioning device mounted on the vehicle and the vehicle speed, and estimates the longitudinal position from comparison between a rate of change in pitch angle of the vehicle along the road and a rate of change in height on the map along the road, based on the measured position, the map information, and the pitch angle.

Abstract: A power amplifier circuit is capable of restraining uneven temperature distribution among a plurality of unit transistors while restraining the deterioration of the characteristics of the power amplifier circuit. The power amplifier circuit includes: a first transistor group which includes a plurality of unit transistors and which amplifies an input signal and outputs an amplified signal; a bias circuit which supplies a bias current or a bias voltage to a base or a gate of each unit transistor of the first transistor group; a plurality of first resistive elements, each of which is connected between the base or the gate of each unit transistor of the first transistor group and an output of the bias circuit; and a plurality of second resistive elements, each of which is connected between an emitter or a source of each unit transistor of the first transistor group and a reference potential.

Abstract: A vehicle localization system includes: an electronic control unit estimating a vehicle position including a longitudinal position on a map in an extension direction of a road on which the vehicle is traveling and a lateral position on the map in a lateral direction of the road; and a storage device storing a map database including map information. The electronic control unit obtains a vehicle speed and a pitch angle of the vehicle, perceives a measured position of the vehicle on the map based on a measurement result of a positioning device mounted on the vehicle and the vehicle speed, and estimates the longitudinal position from comparison between a rate of change in pitch angle of the vehicle along the road and a rate of change in height on the map along the road, based on the measured position, the map information, and the pitch angle.

Abstract: An axial deviation detection device configured to detect axial deviation of a LIDAR system mounted on a vehicle is provided. The axial deviation detection device includes a storage device and a processor. The storage device stores reference plane information indicating a position of a reference plane, and LIDAR measurement information indicating positions of point clouds detected by the LIDAR system in a sensor coordinate system. The processor is configured to extract a road surface point cloud representing a road surface from the point clouds indicated in the LIDAR measurement information, approximate the road surface point cloud by an approximation plane and acquire the approximation plane as an estimated road plane, compare the estimated road plane with the reference plane indicated by the reference plane information, and determine that the axial deviation occurs when a deviation between the estimated road plane and the reference plane is larger than a threshold.

Abstract: A power amplifier circuit is capable of restraining uneven temperature distribution among a plurality of unit transistors while restraining the deterioration of the characteristics of the power amplifier circuit. The power amplifier circuit includes: a first transistor group which includes a plurality of unit transistors and which amplifies an input signal and outputs an amplified signal; a bias circuit which supplies a bias current or a bias voltage to a base or a gate of each unit transistor of the first transistor group; a plurality of first resistive elements, each of which is connected between the base or the gate of each unit transistor of the first transistor group and an output of the bias circuit; and a plurality of second resistive elements, each of which is connected between an emitter or a source of each unit transistor of the first transistor group and a reference potential.

Abstract: A power amplifier circuit is capable of restraining uneven temperature distribution among a plurality of unit transistors while restraining the deterioration of the characteristics of the power amplifier circuit. The power amplifier circuit includes: a first transistor group which includes a plurality of unit transistors and which amplifies an input signal and outputs an amplified signal; a bias circuit which supplies a bias current or a bias voltage to a base or a gate of each unit transistor of the first transistor group; a plurality of first resistive elements, each of which is connected between the base or the gate of each unit transistor of the first transistor group and an output of the bias circuit; and a plurality of second resistive elements, each of which is connected between an emitter or a source of each unit transistor of the first transistor group and a reference potential.

Abstract: To control a speed at a time of entering a curved road a vehicle to autonomously travel within a travelling lane even in a case where there is an error in an estimated longitudinal position of the vehicle. A curve travel speed calculation unit 15b calculates a curve travel speed for a vehicle to autonomously travelling in a travelling lane based on a curve radius and an estimated error in longitudinal position. A speed planning unit 15c and a travel control unit 17 decelerate the vehicle M such that the speed of the vehicle M becomes the curve travel speed at the time of entering the curved road in front of the vehicle M in a case where the speed of the vehicle M is equal to or higher than the curve travel speed and the curve travel speed is equal to or higher than the reference speed.

Abstract: A power amplifier circuit is capable of restraining uneven temperature distribution among a plurality of unit transistors while restraining the deterioration of the characteristics of the power amplifier circuit. The power amplifier circuit includes: a first transistor group which includes a plurality of unit transistors and which amplifies an input signal and outputs an amplified signal; a bias circuit which supplies a bias current or a bias voltage to a base or a gate of each unit transistor of the first transistor group; a plurality of first resistive elements, each of which is connected between the base or the gate of each unit transistor of the first transistor group and an output of the bias circuit; and a plurality of second resistive elements, each of which is connected between an emitter or a source of each unit transistor of the first transistor group and a reference potential.

Abstract: To control a speed at a time of entering a curved road a vehicle to autonomously travel within a travelling lane even in a case where there is an error in an estimated longitudinal position of the vehicle. A curve travel speed calculation unit 15b calculates a curve travel speed for a vehicle to autonomously travelling in a travelling lane based on a curve radius and an estimated error in longitudinal position. A speed planning unit 15c and a travel control unit 17 decelerate the vehicle M such that the speed of the vehicle M becomes the curve travel speed at the time of entering the curved road in front of the vehicle M in a case where the speed of the vehicle M is equal to or higher than the curve travel speed and the curve travel speed is equal to or higher than the reference speed.

Abstract: The linearity of a power amplifying module employing an envelope tracking scheme is improved. The power amplifying module includes a first bipolar transistor having a base to which a first radio frequency signal is input and an emitter grounded, and a second bipolar transistor having a base to which a first constant voltage is applied, a collector to which a first power supply voltage is applied, the first power supply voltage adapted to vary in accordance with an amplitude of the first radio frequency signal, and an emitter connected to a collector of the first bipolar transistor. The second bipolar transistor is configured to output a first amplified signal, obtained by amplifying the first radio frequency signal, from the collector of the second bipolar transistor.

Abstract: The linearity of a power amplifying module employing an envelope tracking scheme is improved. The power amplifying module includes a first bipolar transistor having a base to which a first radio frequency signal is input and an emitter grounded, and a second bipolar transistor having a base to which a first constant voltage is applied, a collector to which a first power supply voltage is applied, the first power supply voltage adapted to vary in accordance with an amplitude of the first radio frequency signal, and an emitter connected to a collector of the first bipolar transistor. The second bipolar transistor is configured to output a first amplified signal, obtained by amplifying the first radio frequency signal, from the collector of the second bipolar transistor.

Abstract: In a power amplifier, in response to a power mode signal at a predetermined level, a first switch circuit supplies a signal to first and second amplifier devices that perform parallel operations. In response to the power mode signal at another level, the first switch circuit supplies a signal to the first amplifier device and stops supplying the signal to the second amplifier device such that the first amplifier device performs a standalone operation. One end of an impedance adjusting circuit is connected to a connection node between the outputs of the first and second amplifier devices, the other end of the impedance adjusting circuit is connected to one end of a second switch circuit, and the other end of the second switch circuit is connected to a ground potential. The impedance adjusting circuit includes a reactance element.

Abstract: In a power amplifier, in response to a power mode signal at a predetermined level, a first switch circuit supplies a signal to first and second amplifier devices that perform parallel operations. In response to the power mode signal at another level, the first switch circuit supplies a signal to the first amplifier device and stops supplying the signal to the second amplifier device such that the first amplifier device performs a standalone operation. One end of an impedance adjusting circuit is connected to a connection node between the outputs of the first and second amplifier devices, the other end of the impedance adjusting circuit is connected to one end of a second switch circuit, and the other end of the second switch circuit is connected to a ground potential. The impedance adjusting circuit includes a reactance element.