公开(公告)号：US20020159503A1

公开(公告)日：2002-10-31

申请号：US09811082

申请日：2001-03-16

Applicant: Conexant Systems, Inc.

Inventor： Balasubramanian Ramachandran

IPC: H04B001/69

CPC classification number: H04W52/267 ,  H03G3/004 ,  H03G3/3042 ,  H03G2201/103 ,  H03G2201/307 ,  H03G2201/40 ,  H03G2201/508 ,  H04B1/109 ,  H04L1/0001 ,  H04W52/08 ,  H04W52/38

Abstract: A dynamically varying linearity system nullDVLSnull capable of varying the linearity of a radio frequency (RF) front-end of a communication device responsive to receiving a condition signal indicating a desired mode of operation of a transmitter. The DVLS may include a condition signal indicative of the desired mode of operation and a controller that adjusts the linearity of the transmitter responsive to the condition signal. The condition signal may be responsive to a user interface. The controller, responsive to the condition signal, may dynamically adjust the operating current of the transmitter.

Abstract translation: 一种动态变化的线性系统“DVLS”，其能够响应于接收到指示发射机的所需操作模式的条件信号而改变通信设备的射频（RF）前端的线性度。 DVLS可以包括指示期望的操作模式的条件信号和响应于条件信号来调整发射机的线性度的控制器。 条件信号可以响应于用户界面。 控制器响应于条件信号，可以动态地调整发射机的工作电流。

公开(公告)号：US07933567B2

公开(公告)日：2011-04-26

申请号：US11626134

申请日：2007-01-23

Applicant: Srinivas Guda ,  Kevin Edward Atkinson ,  Amit Butala

Inventor： Srinivas Guda ,  Kevin Edward Atkinson ,  Amit Butala

IPC: H01Q11/12 ,  H03C1/62

CPC classification number: H03G3/3042 ,  H03G2201/508 ,  H04W52/146 ,  H04W52/367

Abstract: Techniques for achieving linear monotonic output power with piecewise non-linear and/or non-monotonic circuits are described. A coarse gain is selected for a first circuit having non-linear and/or non-monotonic characteristics. A fine gain is selected for a second circuit used to account for output power error due to the coarse gain. First and second look-up tables may store output power versus gain for the first and second circuits, respectively. An output power in the first look-up table may be selected based on the requested output power, and the gain corresponding to the selected output power may be provided as the coarse gain. An output power in the second look-up table may be selected based on the output power error, and the gain corresponding to the selected output power may be provided as the second gain.

Abstract translation: 描述了用分段非线性和/或非单调电路实现线性单调输出功率的技术。 对具有非线性和/或非单调特性的第一电路选择粗增益。 对于用于考虑由于粗增益导致的输出功率误差的第二电路，选择精细增益。 第一和第二查找表可以分别存储第一和第二电路的输出功率与增益。 可以基于所请求的输出功率来选择第一查找表中的输出功率，并且可以将与所选择的输出功率相对应的增益提供为粗增益。 可以基于输出功率误差来选择第二查找表中的输出功率，并且可以将与所选输出功率相对应的增益提供为第二增益。

公开(公告)号：US07130596B2

公开(公告)日：2006-10-31

申请号：US10694451

申请日：2003-10-27

Applicant: Balasubramanian Ramachandran

Inventor： Balasubramanian Ramachandran

IPC: H04Q7/20

CPC classification number: H04W52/267 ,  H03G3/004 ,  H03G3/3042 ,  H03G2201/103 ,  H03G2201/307 ,  H03G2201/40 ,  H03G2201/508 ,  H04B1/109 ,  H04L1/0001 ,  H04W52/08 ,  H04W52/38

Abstract: A dynamically varying linearity system “DVLS” capable of varying the linearity of a radio frequency (RF) front-end of a communication device responsive to receiving a condition signal indicating a desired mode of operation of a transmitter. The DVLS may include a condition signal indicative of the desired mode of operation and a controller that adjusts the linearity of the transmitter responsive to the condition signal. The condition signal may be responsive to a user interface. The controller, responsive to the condition signal, may dynamically adjust the operating current of the transmitter.

公开(公告)号：US20040185807A1

公开(公告)日：2004-09-23

申请号：US10694451

申请日：2003-10-27

Inventor： Balasubramanian Ramachandran

IPC: H01Q011/12 ,  H04B001/04

CPC classification number: H04W52/267 ,  H03G3/004 ,  H03G3/3042 ,  H03G2201/103 ,  H03G2201/307 ,  H03G2201/40 ,  H03G2201/508 ,  H04B1/109 ,  H04L1/0001 ,  H04W52/08 ,  H04W52/38

Abstract: A dynamically varying linearity system nullDVLSnull capable of varying the linearity of a radio frequency (RF) front-end of a communication device responsive to receiving a condition signal indicating a desired mode of operation of a transmitter. The DVLS may include a condition signal indicative of the desired mode of operation and a controller that adjusts the linearity of the transmitter responsive to the condition signal. The condition signal may be responsive to a user interface. The controller, responsive to the condition signal, may dynamically adjust the operating current of the transmitter.

公开(公告)号：US20030034839A1

公开(公告)日：2003-02-20

申请号：US09931737

申请日：2001-08-20

Inventor： Peter John Poggi ,  Tim Dittmer ,  George Cabrera

IPC: H03G003/20

CPC classification number: H03G3/3042 ,  H03F1/0222 ,  H03F1/0233 ,  H03F1/0244 ,  H03F1/0277 ,  H03F3/211 ,  H03G3/004 ,  H03G2201/103 ,  H03G2201/504 ,  H03G2201/508 ,  H03G2201/702

Abstract: The variable power supply to an amplifier in an electrical circuit is dynamically controlled through the use of a lookup table responsive to one or more operating conditions of the electrical circuit. The lookup table is indexed by one or more of the operating conditions and the amount of amplification to be applied to an input signal to the amplifier is determined. One embodiment of the invention comprises a television transmitter circuit including a power amplifier circuit capable of amplifying a variable frequency COFDM or 8VSB input signal where the amount of amplification applied to the input signal is dynamically controlled through the use of a lookup table as a function of the frequency of the input signal.

Abstract translation: 通过使用响应于电路的一个或多个操作条件的查找表来动态地控制电路中的放大器的可变电源。 查找表由一个或多个操作条件索引，并确定要施加到放大器的输入信号的放大量。 本发明的一个实施例包括一种电视发射机电路，其包括能够放大可变频率COFDM或8VSB输入信号的功率放大器电路，其中通过使用查找表作为函数来动态地控制施加到输入信号的放大量 输入信号的频率。