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

• US 7,321,752 B2
• Filed: 07/14/2004
• Issued: 01/22/2008
• Est. Priority Date: 09/04/2003
• Status: Expired due to Fees

• Current Assignee: Cinterion Wireless Modules GmbH (Thales SA)
• Original Assignee: Siemens AG
• Inventors: Walbracht, Jörg
• Primary Examiner(s): Urban; Edward F.
• Assistant Examiner(s): HU, RUI MENG
• Application Number:
  US10/534,771
• Publication Number:
  US 20060014502A1
• Time in Patent Office: 1,287 Days
• Field of Search: 330/107, 330/140, 330/255, 330/262, 330/265, 330/276, 330/55, 330/122, 455/126, 455/205, 455/110, 455/127.1, 455/127.2, 455/127.5, 455/108
• US Class Current: 455/127.1
• 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. 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 from an input signal,

wherein the outputs of the phase modifiers are coupled to a passive component,

wherein a symmetrical transformer included in the amplifier arrangement is used as the passive component,

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, and

wherein a signal generated by the power amplifier is divided into two part signals of equal size and fed to the plurality of phase modifiers.

2. The apparatus according to claim 1 wherein power is obtained at the passive component after the phase modifiers.

3. The apparatus according to claim 1, wherein an amplitude modulated signal is generated by the amplifier arrangement by means of fed amplitude information.

4. The apparatus according to claim 1, wherein the input impedance of the rectifier is amplitude-independent.

5. The apparatus according to claim 1, wherein a single-path or multipath reclifier is used as the rectifier.

6. The apparatus according to claim 1, wherein a maximum peak power arising in the power amplifier is transmitted with a deviation of up to 6 dB.

7. The apparatus according to claim 1, 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.

8. The apparatus according to claim 4, further comprising a supply unit coupled to the power amplifier, wherein the supply unit is one of a battery and an ac adapter.