METHOD FOR COMPENSATING A POWER AMPLIFICATION UNIT OF A WIRELESS RF MODULE

• US 20150147977A1
• Filed: 06/13/2014
• Published: 05/28/2015
• Est. Priority Date: 11/22/2013
• Status: Active Grant

• Current Assignee: Airoha Technology Corporation (MediaTek, Inc.)
• Original Assignee: Airoha Technology Corporation (MediaTek, Inc.)
• Inventors: LEE, CHIEN-KUANG, LIN, HENG-CHIH
• Granted Patent: US 9,331,645 B2
• Time in Patent Office: Days
• US Class Current: 455/69
• CPC Class Codes: H03F 1/0227 using supply converters
• CPC Class Codes: H03F 1/0266 by using a signal derived from the input signal
• CPC Class Codes: H03F 1/3223 using feed-forward H03F1/3211 takes precedence
• CPC Class Codes: H03F 2200/451 the amplifier being a radio frequency amplifier
• CPC Class Codes: H03F 2200/555 A voltage generating circuit being realised for biasing different circuit elements
• CPC Class Codes: H03F 3/19 with semiconductor devices only
• CPC Class Codes: H03F 3/195 in integrated circuits
• CPC Class Codes: H03F 3/21 with semiconductor devices only H03F3/245 takes precedence
• CPC Class Codes: H03F 3/24 of transmitter output stages
• CPC Class Codes: H04B 1/40 Circuits
• CPC Class Codes: H04W 52/226 using past references to control power, e.g. look-up-table

Abstract

The present invention relates to a method for compensating a power amplification unit of a wireless RF module that includes a baseband unit, a RF transceiver unit, a power amplification unit and a control unit. The baseband unit is connected to the power amplification unit through the control unit and the RF transceiver unit. Based on the characteristic of the power amplification unit, the baseband unit provides a control signal to regulate the output signal characteristic of the power amplification unit, or provides a RF transceiver unit control signal to regulate the characteristics of the RF signal being transmitted by the RF transceiver unit to the power amplification unit, or to regulate the characteristics of the baseband signal being transmitted to the RF transceiver unit, enabling the characteristics of the output signal of the power amplification unit to meet the specifications of the related system.

Claims

1. A method for compensating a power amplification unit of a wireless RF module comprising a baseband unit, a RF transceiver unit, a control unit and a power amplification unit, said baseband unit being electrically connected to said power amplification unit through said control unit and said RF transceiver unit, the method comprising the steps of:

obtaining at least one characteristic of said power amplification unit, wherein said at least one characteristic comprises the output power of said power amplification unit;

setting said characteristic of said power amplification unit in said baseband unit;

enabling said baseband unit to send at least one control signal to said control unit based on said characteristic of said power amplification unit; and

enabling said control unit to regulate the output signal characteristics of said power amplification unit subject to said control signal.

2. The method as claimed in claim 1, wherein said control signal is an analog signal or a digital signal.

3. The method as claimed in claim 1, wherein said characteristic comprises the characteristic of the output power of said power amplification unit relative to temperature.

4. The method as claimed in claim 1, wherein said characteristic comprises the characteristic of the output power of said power amplification unit relative to frequency.

5. The method as claimed in claim 1, wherein said characteristic comprises the characteristic of the output signal of said power amplification unit relative to time.

6. The method as claimed in claim 1, wherein said characteristic comprises the characteristic of linearity of said power amplification unit.

7. The method as claimed in claim 1, wherein said characteristic comprises a bias vs. output signal characteristic of said power amplification unit.

8. The method as claimed in claim 1, wherein said characteristic comprises memory effect characteristics of said power amplification unit.

9. The method as claimed in claim 1, further comprising the step of establishing a lookup table or an equivalent behavioral model based on said characteristic of said power amplification unit.

10. The method as claimed in claim 9, further comprising the step of enabling said baseband unit to regulate said control signal being sent to said control unit based on said lookup table or said equivalent behavioral model.

11. The method as claimed in claim 10, further comprising the step of enabling said baseband unit to get at least one operating information from said power amplification unit.

12. The method as claimed in claim 11, further comprising the step of enabling said baseband unit to regulate said control signal being sent to said control unit based on said operating information of said power amplification unit and said lookup table or said equivalent behavioral model.

13. The method as claimed in claim 11, wherein said operating information comprises the operating temperature or the operating frequency or the operating bandwidth of said power amplification unit.

14. The method as claimed in claim 11, wherein said operating information comprises the characteristics of the operating signal of said wireless RF module.

15. The method as claimed in claim 9, further comprising the step of enabling said RF transceiver unit to transmit a RF signal to said power amplification unit.

16. The method as claimed in claim 15, further comprising the step of enabling said baseband unit to regulate at least one RF transceiver unit control signal being sent to said RF transceiver unit based on said lookup table or said equivalent behavioral model and enabling said RF transceiver unit to regulate the characteristics of said RF signal subject to said RF transceiver unit control signal.

17. The method as claimed in claim 15, further comprising the step of enabling said baseband unit to regulate the characteristics of a baseband signal being transmitted to said RF transceiver unit based on said lookup table or said equivalent behavioral model.

18. The method as claimed in claim 15, further comprising the step of enabling said baseband unit to get at least one operating information from said power amplification unit.

19. The method as claimed in claim 16, further comprising the step of enabling said baseband unit to regulate said control signal being sent to said control unit based on said operating information of said power amplification unit and said lookup table or said equivalent behavioral model.

20. The method as claimed in claim 16, wherein said operating information comprises the operating temperature of said power amplification unit or the frequency or the bandwidth said power amplification unit.

21. The method as claimed in claim 18, further comprising the step of enabling said baseband unit to regulate said RF transceiver unit control signal being sent to said RF transceiver unit based on said lookup table or said equivalent behavioral model and said operating information of said power amplification unit, and enabling said RF transceiver unit to regulate the characteristics of said RF signal subject to said RF transceiver unit control signal.

22. The method as claimed in claim 1, wherein said control signal comprises a power control signal or a power amplification unit control signal.

23. The method as claimed in claim 22, wherein said baseband unit comprises a digital to analog converter adapted for converting said power control signal into an analog control signal and then sending the analog control signal to said control unit.