Linear amplification device with a non-linear amplification element for a mobile radio device

• US 20060014502A1
• Filed: 07/14/2004
• Published: 01/19/2006
• Est. Priority Date: 09/04/2003
• Status: Active Grant

• Current Assignee: Gemalto M2M GmbH (Thales SA)
• Original Assignee: Siemens AG
• Inventors: Walbracht, Jorg
• Granted Patent: US 7,321,752 B2
• Time in Patent Office: Days
• US Class Current: 455/126
• CPC Class Codes: H03F 3/195 in integrated circuits

Abstract

A system and method to optimize the efficiency of an amplifier device is provided by the including a non-linear amplifier in a mobile radio device. A phase displaced signal in relation to the input signal is respectively produced in the amplifier device with a non-linear power amplifier and in a plurality of push-pull successive phase modifiers, and the outputs of the phase modifier are connected by a passive component.

Claims

1-20. -20. (canceled)

21. An apparatus for optimizing the efficiency of an amplifier arrangement comprising:

a non-linear power amplifier in a mobile radio device; and

a plurality of push-pull phase modifiers coupled to said amplifier, wherein said phase modifiers generate a signal offset in phase form an input signal and wherein the outputs of the phase modifiers are coupled to a passive component.

22. The apparatus according to claim 21, wherein a symmetrical transformer included in the amplifier arrangement is used as the passive component.

23. The apparatus according to claim 21 wherein power is obtained at the passive component after the phase modifiers.

24. The apparatus according to claim 21, wherein an amplitude modulated signal is generated by the amplifier arrangement by means of fed amplitude information.

25. The apparatus according to claim 21, wherein a load balancing resistor is used in the amplifier arrangement as the passive component.

26. The apparatus according to claim 22, wherein a voltage is decoupled in the symmetrical transformer that is rectified in a rectifier, and wherein the direct current output by the rectifier is fed to a supply unit as charge current.

27. The apparatus according to claim 25, wherein power is dissipated in load balancing resistor.

28. The apparatus according to claim 21, wherein the push-pull phase modifiers are controlled using a modulation signal.

29. The apparatus according to claim 27, wherein the power dissipation is referenced in a symmetrical amplifier to a voltage potential.

30. The apparatus according to claim 21, wherein a signal generated by the power amplifier is divided into two part signals of equal size and fed to the plurality phase modifiers.

31. The apparatus according to claim 26, wherein the input impedance of the rectifier is amplitude-independent.

32. The apparatus according to claim 26, wherein a single-path or multipath rectifier is used as the rectifier.

33. The apparatus according to claim 21, wherein the maximum peak power arising in the power amplifier can be transmitted with a deviation of up to 6 dB.

34. The apparatus according to claim 21, wherein the transmitted power of the power amplifier is up to 6 dB around the crest factor above the average power required at the output.

35. The apparatus according to claim 31, further comprising a supply unit coupled to the power amplifier, wherein the supply unit is one of a battery and an ac adapter.