US 8,787,851 B2Granted

System and method for quickly power amplifier control

AssigneeHuawei Device Co., Ltd.

InventorsWei Xu, Yu Deng

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Abstract

Embodiments of the present invention provide a system and method for power amplifier control. Before a fixed gain amplifier is disabled and after an automatic gain controller adjusts gain for the last time, a reference transmit power value is read from the automatic gain controller. A gain level is read from the fixed gain amplifier. The reference transmit power value and the gain level are saved in a storage module. Before the fixed gain amplifier is enabled and after the automatic gain controller adjusts gain for the last time, the reference transmit power value saved in the storage module is written into the automatic gain controller and the gain level saved in the storage module is written into the fixed gain amplifier.

Claims9

Dependent claims

A system for power amplifier control, the system comprising:

an automatic gain controller;
a variable gain amplifier having an input coupled to an output of the automatic gain controller;
a fixed gain amplifier having an input coupled to an output of the variable gain amplifier and having an output coupled to an input of the automatic gain controller;
a radio frequency antenna having an input coupled to the output of the fixed gain amplifier;
a storage module;
and
a processor, configured to:
before the fixed gain amplifier is disabled and after the automatic gain controller adjusts gain for a last time, read a reference transmit power value from the automatic gain controller, read a gain level from the fixed gain amplifier, and save the reference transmit power value and the gain level in the storage module;
and
before the fixed gain amplifier is enabled and after the automatic gain controller adjusts gain for the last time, write the reference transmit power value saved in the storage module into the automatic gain controller and write the gain level saved in the storage module into the fixed gain amplifier.

7 more elements

A method for controlling a power amplifier, the method comprising:

before a fixed gain amplifier is disabled and after an automatic gain controller adjusts gain for a last time, reading a reference transmit power value from the automatic gain controller and reading a gain level from the fixed gain amplifier and saving the reference transmit power value and the gain level in a storage module;
and
before the fixed gain amplifier is enabled and after the automatic gain controller adjusts gain for the last time, writing the reference transmit power value saved in the storage module into the automatic gain controller and writing the gain level saved in the storage module into the fixed gain amplifier.

A method for controlling a power amplifier, the method comprising:

reading a reference transmit power value from an automatic gain controller;
reading a gain level from a fixed gain amplifier;
saving the reference transmit power value and the gain level in a storage module;
disabling the fixed gain amplifier after saving the reference transmit power value and the gain level in the storage module;
adjusting gain by the automatic gain controller after saving the reference transmit power value and the gain level in the storage module;
after the automatic gain controller adjusts gain for a last time, writing the reference transmit power value saved in the storage module into the automatic gain controller;
after the automatic gain controller adjusts gain for the last time, writing the gain level saved in the storage module into the fixed gain amplifier;
and
after writing the reference transmit power value and the gain level into the fixed gain amplifier, enabling the fixed gain amplifier.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/925,394Filed 24 Jun 2013
Priority: CN 2012 1 023667510 Jul 2012
Published: US 2014/0018022 A116 Jan 2014
Granted: 22 Jul 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

H04W 52/52
Transmission power control [TPC]: using AGC [Automatic Gain Control] circuits or amplifiers
H03G 3/3047
In modulators, frequency-changers, transmitters or power amplifiers: for intermittent signals, e.g. burst signals
H04W
Wireless communication networks
H03G
Control of amplification

Family

US 2014/0018022 A1Pre-grant publication · published 16 Jan 2014
US 8,787,851 B2This patent

From the US filing history. Foreign family members aren’t listed.

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