Abstract: The implementation of this application provides a power management method, a terminal. The method includes: obtaining a configuration change signal of a terminal device in response to a configuration change of the terminal device; obtaining an output power level truth table of the terminal device based on the configuration change signal of the terminal device, where the output power level truth table includes a configuration of the terminal device and a power level and a fallback power of the terminal device in the configuration; obtaining the power level and the fallback power of the terminal device based on the output power level truth table; setting an output power of the terminal device based on the fallback power of the terminal device, and outputting a corresponding power value based on the power level.

Abstract: A power tube driver of a class-D audio amplifier includes high-side and low-side fixed charge/discharge gate driving circuits, high-side and low-side power tubes, a dead time generation circuit based on gate voltage detection, high-side and low-side gate charge/discharge accelerating circuits, and high-side and low-side gate voltage detection circuits. The class-D audio amplifier with the features of low radiation interference, and high efficiency, linearity and robustness can be balanced easily.

Abstract: A power tube driver of a class-D audio amplifier includes high-side and low-side fixed charge/discharge gate driving circuits, high-side and low-side power tubes, a dead time generation circuit based on gate voltage detection, high-side and low-side gate charge/discharge accelerating circuits, and high-side and low-side gate voltage detection circuits. The class-D audio amplifier with the features of low radiation interference, and high efficiency, linearity and robustness can be balanced easily.

Abstract: Embodiments of the present invention disclose an antenna and a mobile terminal, which are relate to the field of antenna technologies, so as to improve radiation performance of the antenna. The antenna includes a first antenna arm and a second antenna arm that are not in contact with each other, where one end of the first antenna arm is configured for grounding, one end of the second antenna arm is configured to connect to a feed point, and the first antenna arm and the second antenna arm have at least one relative area.

Abstract: Embodiments of the present invention disclose an antenna and a mobile terminal, which are relate to the field of antenna technologies, so as to improve radiation performance of the antenna. The antenna includes a first antenna arm and a second antenna arm that are not in contact with each other, where one end of the first antenna arm is configured for grounding, one end of the second antenna arm is configured to connect to a feed point, and the first antenna arm and the second antenna arm have at least one relative area.