Device including a switching unit and applications thereof
A device includes a switching unit including N input ports and M output ports, wherein N≥M≥2. The switching unit is configured to selectively interconnect each of the M output ports with a different one of the N input ports. The device further includes M attenuators, wherein each of the M attenuators is electrically coupled to a different one of the M output ports of the switching unit.
1. A device, comprising:
a switch comprising N input ports and M output ports, wherein N≥M≥2, wherein the switch is configured to selectively interconnect each of the M output ports with a different one of the N input ports;
M attenuators, wherein each of the M attenuators is electrically coupled to a different one of the M output ports of the switch; and
N low pass filters, wherein each of the N low pass filters is electrically coupled to a different one of the N input ports of the switch.
2. The device of claim 1 , wherein the switch comprises an M-pole N-throw switch.
3. The device of claim 1 , wherein M=2 and N=5.
4. The device of claim 1 ,
wherein each of the N input ports of the device is configured to be electrically coupled to a coupled port of a directional coupler or an isolated port of a directional coupler.
5. The device of claim 4 , wherein the directional coupler is arranged in an uplink transmission path of an RF front end.
6. The device of claim 1 ,
wherein each of the M output ports of the device is configured to be electrically coupled to a processor, and
wherein the processor is configured to tune an uplink antenna or a power amplifier arranged in an uplink transmission path of an RF front end based on an output of the device.
7. The device of claim 1 , wherein at least one of the switch and the M attenuators is controlled by a baseband processor.
8. The device of claim 1 , wherein the switch, the M attenuators, and the N low pass filters -are monolithically integrated in a single semiconductor integrated circuit.
9. The device of claim 1 , further comprising:
M low pass filters, wherein each of the M low pass filters is electrically coupled to a different one of the M attenuators.
10. The device of claim 9 , wherein each of the M low pass filters is configured to attenuate a Wi-Fi frequency band.
11. The device of claim 9 , wherein each of the M low pass filters is configured to pass a mobile communication frequency band.
12. The device of claim 1 , further comprising:
N switches, wherein each of the N switches is electrically interconnected between a reference voltage and a different one of the N input ports of the switch.
13. The device of claim 12 , further comprising:
N resistors, wherein each of the N resistors is electrically interconnected between a different one of the N switches and the reference voltage.
14. The device of claim 1 , further comprising:
M single-ended to differential converters, wherein each of the M single-ended to differential converters is arranged downstream of a different one of the M attenuators.
15. A device, comprising:
a switch comprising N input ports and M output ports, wherein N≥M≥2, wherein the switch is configured to selectively interconnect each of the M output ports with a different one of the N input ports;
M attenuators, wherein each of the M attenuators is electrically coupled to a different one of the M output ports of the switch;
N switches, wherein each of the N switches is electrically interconnected between a reference voltage and a different one of the N input ports of the switch; and
N resistors, wherein each of the N resistors is electrically interconnected between a different one of the N switches and the reference voltage.
16. The device of claim 15 , wherein the switch, the M attenuators, the N switches, and the N resistors are monolithically integrated in a single semiconductor integrated circuit.
17. The device of claim 15 , further comprising:
M low pass filters, wherein each of the M low pass filters is electrically coupled to a different one of the M attenuators.
18. The device of claim 17 , wherein each of the M low pass filters is configured to attenuate a Wi-Fi frequency band.
19. The device of claim 17 , wherein each of the M low pass filters is configured to pass a mobile communication frequency band.