Abstract: A first amplifier circuit in a preceding stage, a second amplifier circuit in a subsequent stage, and a ground external connection terminal are disposed on a substrate. The first and second amplifier circuits each include bipolar transistors, capacitive elements for the respective bipolar transistors, and resistive elements for the respective bipolar transistors. The bipolar transistors each include separate base electrodes, that is, a first base electrode for radio frequency and a second base electrode for biasing. The bipolar transistors of the second amplifier circuit include emitter electrodes connected to the ground external connection terminal. The minimum spacing between the first base electrode and an emitter mesa layer of at least one of the bipolar transistors of the second amplifier circuit is greater than the minimum spacing between the first base electrode and am emitter mesa layer of each of the bipolar transistors of the first amplifier circuit.

Abstract: A quadrature clock generator is disclosed. The quadrature clock generator may include a first injection-locked oscillator, a phase interpolator, and a second injection-locked oscillator. The first injection-locked oscillator may generate a first plurality clock signals from a first reference clock signal. The phase interpolator may generate a second reference clock signal from the first plurality of clock signals, and the second injection-locked oscillator may generate a second plurality of clock signals from the second reference clock signal. A first quadrature clock signal may be selected from the first plurality of clock signals and a second quadrature clock signal may be selected from the second plurality of reference clock signals.

Abstract: A collector layer is disposed on a substrate. The collector layer is a continuous region when viewed in plan. A base layer is disposed on the collector layer. An emitter layer is disposed on the base layer. An emitter mesa layer is disposed on the emitter layer. Two base electrodes are located outside the emitter mesa layer and within the base layer when viewed in plan. The two base electrodes are electrically connected to the base layer. Two capacitors are disposed on or above the substrate. Each of the two capacitors is connected between a corresponding one of the two base electrodes and a first line above the substrate. Two resistance elements are disposed on or above the substrate. Each of the two resistance elements is connected between a corresponding one of the two base electrodes and a second line on or above the substrate.

Abstract: The present disclosure discloses a communication method and device in the field of communication technology. The method includes: transmitting at least one level information of the UE to a base station, the level information being used for indicating a transmission rate of the UE for communication, when a first service is triggered, querying first level information corresponding to the first service in a corresponding relationship between the service and the level information of the UE, and if the at least one level information comprises the first level information, transmitting a first service request to the base station at a transmission rate indicated by the first level information, the first service request being used for requesting the base station to communicate with the UE for the first service according to the transmission rate indicated by the first level information.

Abstract: Methods and apparatus relate to a bidirectional differential interface having a voltage-mode transmit driver architecture formed of multiple selectively enabled slices for coarse output resistance impedance matching. In an illustrative example, the transmit driver may include a programmable resistance for fine-tuning to impedance match the output resistance for transmit operation. During receive operation, protective voltage may be proactively applied to gates of drive transistors, for example, to minimize voltage stresses applied by external signal sources. Some implementations may automatically float the sources of the drive transistors, for example, to prevent back-feeding externally driven signal currents during receive mode operations. The transmit driver may have programmable voltage swing on, for example, the upper and/or lower bounds to enhance compatibility. A programmable common mode voltage node may be selectively applied, for example, through common mode resistors for receive mode operations.

Abstract: The present disclosure discloses a communication method and device in the field of communication technology. The method includes: transmitting at least one level information of the UE to a base station, the level information being used for indicating a transmission rate of the UE for communication, when a first service is triggered, querying first level information corresponding to the first service in a corresponding relationship between the service and the level information of the UE, and if the at least one level information comprises the first level information, transmitting a first service request to the base station at a transmission rate indicated by the first level information, the first service request being used for requesting the base station to communicate with the UE for the first service according to the transmission rate indicated by the first level information.