Power supply device, method for managing power supply thereof and wireless communication terminal

Patent metadata

Field	Value
Publication number	US-9166478-B2
Application number	US-201214371830-A
Country	US
Kind code	B2
Filing date	Apr 5, 2012
Priority date	Jan 12, 2012
Publication date	Oct 20, 2015
Grant date	Oct 20, 2015

Abstract

In the patent document, the wireless communication terminal includes a baseband working unit, a RF working unit and a DC power converter connected with the baseband working unit and the RF working unit, further including a power supply device, a CPU and an envelope detection device; the power supply device is configured to receive a voltage supplied by the DC power converter, supplying an output voltage to a PA in the RF working unit, receiving a control signal sent from CPU, adjusting the output voltage according to the control signal; the envelope detection device is configured to detect the envelope signal of output signal of the PA in real time and send the envelope signal to the CPU; the CPU is configured to receive the voltage supplied by the DC power converter, convert the envelope signal into a control signal and send the control signal to the power supply device.

First claim

What I claims is:

1. A wireless communication terminal, comprising a baseband working unit and a radio frequency (RF) working unit, and a direct current (DC) power converter connected with both said baseband working unit and said RF working unit, said wireless communication terminal further comprising: a power supply device, a central processing unit (CPU) and an envelope detection device, wherein:
said power supply device is configured to receive a voltage supplied by said DC power converter, provide an output voltage to a power amplifier (PA) in said RF working unit, receive a control signal sent by said CPU, and adjust said output voltage according to said control signal, so that said output voltage meets an envelope variation curve of an output signal of said PA;
said envelope detection device is connected with said RF working unit and is configured to detect an envelope signal of the output signal of said PA in real time, and send said envelope signal to said CPU;
said CPU is connected respectively with said DC power converter, said power supply device and said envelope detection device, and the CPU is configured to: receive a voltage provided by said DC power converter, convert said envelope signal sent by said envelope detection device into the control signal, and send the control signal to said power supply device.

2. The wireless communication terminal of claim 1 , wherein:
said CPU is further configured to convert information inputted via a human-machine interface of said wireless communication terminal into a control signal, and send the converted control signal to said power supply device.

3. The wireless communication terminal of claim 1 , wherein:
said CPU is connected with said power supply device by Inter Integrated Circuit (IIC) bus.

4. The wireless communication terminal of claim 3 , wherein:
said power supply device comprises a DC power conversion unit, a power input detection unit, a state monitoring and logic control unit and a power output detection unit, wherein:
said DC power conversion unit is configured to receive the voltage supplied by said DC power converter, provide the output voltage to said PA, receive a logic control signal sent by said state monitoring and logic control unit, and adjust said output voltage in accordance with said logic control signal;
said power input detection unit is configured to perform detection on an input signal of said DC power conversion unit, and send an input detection result to said state monitoring and logic control unit;
said power output detection unit is configured to perform detection on an output signal of said DC power conversion unit, and send an output detection result to said state monitoring and logic control unit;
said state monitoring and logic control unit is configured to receive the control signal sent by said CPU, compare any one of said input detection result sent by said power input detection unit and the output detection result sent by said power output detection unit with said control signal and, if the two compared quantities are inconsistent, send the logic control signal to said DC power conversion unit.

5. The wireless communication terminal of claim 4 , wherein:
said state monitoring and logic control unit is implemented with a state machine.

6. A power supply device, comprising a direct current (DC) power conversion unit, a power input detection unit, a state monitoring and logic control unit and a power output detection unit, wherein:
said DC power conversion unit is configured to receive a voltage input by a DC power converter, provide an output voltage to a load, receive a logic control signal sent by said state monitoring and logic control unit, and adjust said output voltage in accordance with said logic control signal, so that said output voltage meets needs of said load;
said power input detection unit is configured to perform detection on an input signal of said DC power conversion unit and send an input detection result to said state monitoring and logic control unit;
said power output detection unit is configured to perform detection on an output signal of said DC power conversion unit and send an output detection result to said state monitoring and logic control unit;
said state monitoring and logic control unit is configured to receive a control signal sent by a central processing unit (CPU), and compare any one of said input detection result sent by said power input detection unit and the output detection result sent by said power output detection unit with said control signal and, if the two compared quantities are inconsistent, send the logic control signal to said DC power conversion unit; wherein at least one of the units is implemented using hardware.

7. The power supply device of claim 6 , wherein:
said state monitoring and logic control unit is implemented with a state machine.

8. The power supply device of claim 6 , wherein:
said load comprises a radio frequency power amplifier.

9. The wireless communication terminal of claim 2 , wherein:
said CPU is connected with said power supply device by Inter Integrated Circuit (IIC) bus.

10. The wireless communication terminal of claim 9 , wherein:
said power supply device comprises a DC power conversion unit, a power input detection unit, a state monitoring and logic control unit and a power output detection unit, wherein:
said DC power conversion unit is configured to receive the voltage supplied by said DC power converter, provide the output voltage to said PA, receive a logic control signal sent by said state monitoring and logic control unit, and adjust said output voltage in accordance with said logic control signal;
said power input detection unit is configured to perform detection on an input signal of said DC power conversion unit, and send an input detection result to said state monitoring and logic control unit;
said power output detection unit is configured to perform detection on an output signal of said DC power conversion unit, and send an output detection result to said state monitoring and logic control unit;
said state monitoring and logic control unit is configured to receive the control signal sent by said CPU, compare any one of said input detection result sent by said power input detection unit and the output detection result sent by said power output detection unit with said control signal and, if the two compared quantities are inconsistent, send the logic control signal to said DC power conversion unit.

11. The wireless communication terminal of claim 10 , wherein:
said state monitoring and logic control unit is implemented with a state machine.

12. The power supply device of claim 7 , wherein:
said load comprises a radio frequency power amplifier.

Assignees

• Hu Dongping
• Zte Corp

Inventors

• Hu Dongping

Classifications

• H04B2001/045

  with means for improving efficiency · CPC title

• H03F2200/102

  A non-specified detector of a signal envelope being used in an amplifying circuit · CPC title

• H03F3/19

  with semiconductor devices only · CPC title

• H03F3/245

  with semiconductor devices only · CPC title

• H03G3/004

  Control by varying the supply voltage · CPC title