Line card, related apparatus, and control method
Embodiments of this application provide a line card, a control method, and are applied to the field of terminal technologies. The line card includes a battery interface, a voltage conversion module, a plurality of holes, a connection cable, and a speaker; the holes are located between the speaker and the battery interface, two ends of the connection cable are respectively connected to the battery interface and the voltage conversion module, the connection cable runs through a gap between the speaker and a first hole, and the first hole is a hole closest to the speaker among the plurality of holes; the battery interface is configured to connect to a battery; the voltage conversion module is configured to convert a voltage to supply power; and a first current on the connection cable corresponds to a power supply voltage or a power supply current of the voltage conversion module.
1 . A line card, comprising a battery interface, a voltage conversion circuit, a plurality of holes, a connection cable, a speaker, one or more power amplifiers (PAS), and a controller, wherein:
the plurality of holes are located between the speaker and the battery interface, two ends of the connection cable are respectively connected to the battery interface and the voltage conversion circuit, the connection cable runs through a gap between the speaker and a first hole of the plurality of holes, and the first hole is a hole closest to the speaker among the plurality of holes;
the battery interface is connected to the voltage conversion circuit, and the voltage conversion circuit is connected to the one or more PAS;
the battery interface is configured to connect to a battery, to supply power;
the voltage conversion circuit is configured to convert a voltage to supply power for the one or more PAS;
a first current on the connection cable corresponds to a power supply voltage or a power supply current of the voltage conversion circuit when supplying power;
the one or more PAs are configured to amplify a radio frequency signal; and
the controller is configured to control, when the voltage conversion circuit supplies power for the one or more PAs, a current value of a first current, so that the first current reduces a magnetic coupling problem of the speaker.
2 . The line card according to claim 1 , wherein:
the controller is configured to control, when the voltage conversion circuit supplies power for the one or more PAs, the current value of the first current, so that a second induced magnetic field generated by the first current near the speaker weakens a first induced magnetic field generated by a return current of the one or more PAs near the speaker.
3 . The line card according to claim 2 , wherein:
the one or more PAs comprise a first PA and a second PA;
the controller is configured to control, when the voltage conversion circuit supplies power to the first PA, a current value of the first current based on a first correspondence, wherein the first correspondence is a relationship between the current value of the first current and a power supply voltage of the first PA or is a relationship between the current value of the first current and a power supply current of the first PA; and
the controller is configured to control, when the voltage conversion circuit supplies power to the second PA, a current value of the first current based on a second correspondence, wherein the second correspondence is a relationship between the current value of the first current and a power supply voltage of the second PA or is a relationship between the current value of the first current and a power supply current of the second PA.
4 . The line card according to claim 1 , wherein:
the voltage conversion circuit and the one or more PAs are all located on a first side of the speaker, the battery interface is located on a second side of the speaker, and the first side and the second side are two opposite sides centered around the speaker; and
the one or more PAs and the speaker are all located on a third side of the voltage conversion circuit, the battery interface is located on a fourth side of the voltage conversion circuit, and the third side and the fourth side are two opposite sides centered around the voltage conversion circuit.
5 . The line card according to claim 1 , wherein:
the controller is configured to control, when the voltage conversion circuit supplies power, a change frequency of the first current flowing through the connection cable, wherein the current value of the first current corresponds to the power supply voltage or the power supply current of the voltage conversion circuit when supplying power, and the change frequency of the first current is the same as a change frequency of the power supply voltage or is the same as a change frequency of the power supply current.
6 . The line card according to claim 1 , wherein:
the voltage conversion circuit comprises: a first pin, a second pin, and a third pin; and
the first pin is configured to connect to the battery interface, to perform voltage conversion, the second pin is configured to connect to the battery interface through the connection cable, and the third pin is configured to connect to one PA of the one or more PAs.
7 . The line card according to claim 6 , wherein the first pin and the second pin are a same pin.
8 . The line card according to claim 6 , wherein:
the voltage conversion circuit further comprises a fourth pin; and
the third pin is configured to connect to a first PA, the fourth pin is configured to connect to a second PA, and the first PA is different from the second PA.
9 . A terminal device, comprising:
a battery; and
a line card, wherein the line card comprises a battery interface, a voltage conversion circuit, a plurality of holes, a connection cable, and a speaker;
wherein:
the plurality of holes are located between the speaker and the battery interface, two ends of the connection cable are respectively connected to the battery interface and the voltage conversion circuit, the connection cable runs through a gap between the speaker and a first hole, and the first hole is a hole closest to the speaker among the plurality of holes;
the battery interface is configured to connect to a battery, to supply power;
the voltage conversion circuit is configured to convert a voltage to supply power;
a first current on the connection cable corresponds to a power supply voltage or a power supply current of the voltage conversion circuit when supplying power; and
the battery is configured to supply power to the line card through the battery interface.
10 . The terminal device according to claim 9 , wherein the terminal device is configured to:
receive first scheduling information;
when the voltage conversion circuit is controlled to supply power to a first power amplifier (PA), control, in response to the first scheduling information, a current value of the first current based on a first correspondence, wherein a change frequency of the first current is the same as a change frequency of a power supply voltage of the first PA or is the same as a change frequency of a power supply current of the first PA, and the first correspondence is a relationship between the current value of the first current and the power supply voltage of the first PA or is a relationship between the current value of the first current and the power supply current of the first PA;
receive a second scheduling information; and
when the voltage conversion circuit is controlled to supply power to a second PA, control, in response to the second scheduling information, a current value of the first current based on a second correspondence, wherein the change frequency of the first current is the same as a change frequency of a power supply voltage of the second PA or is the same as a change frequency of a power supply current of the second PA, and the second correspondence is a relationship between the current value of the first current and the power supply voltage of the second PA or is a relationship between the current value of the first current and the power supply current of the second PA.
11 . The terminal device according to claim 10 , wherein the first correspondence is obtained through a test of a spectrum analyzer.