公开(公告)号：WO0019603B1

公开(公告)日：2000-05-11

申请号：PCT/US9920994

申请日：1999-09-08

Applicant: CONEXANT SYSTEMS INC

Inventor： ROZENBLIT DMITRIY ,  DOMINO WILLIAM J ,  OSKOWSKY MARK

IPC: H03F1/32 ,  H03G3/00 ,  H03G3/30

CPC classification number: H03G3/3042 ,  H03F1/3241 ,  H03G3/004 ,  H03G3/3047

Abstract: A closed loop power amplifier control system is provided. A self-adapting driver circuit is used to drive the power amplifier in accordance with the feed back error signal. The driver circuit compensates for non-linearities of the power amplifier.

Abstract translation: 提供闭环功率放大器控制系统。 根据反馈误差信号使用自适应驱动电路来驱动功率放大器。 驱动器电路补偿功率放大器的非线性。

公开(公告)号：WO0052840A8

公开(公告)日：2001-05-25

申请号：PCT/US0005379

申请日：2000-03-02

Applicant: CONEXANT SYSTEMS INC

Inventor： ROZENBLIT DMITRIY ,  DOMINO WILLIAM J ,  DAMGAARD MORTEN ,  OSKOWSKY MARK

IPC: H03D3/00 ,  H03D7/14 ,  H04B1/30 ,  H04B1/40

CPC classification number: H04B1/406 ,  H03D3/006 ,  H03D7/1408 ,  H03D7/1433 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/165 ,  H03D2200/009 ,  H04B1/30

Abstract: A multi-band transceiver having a receiver portion and a transmitter portion, wherein the receiver portion includes a direction conversion system for directly downconverting a signal to baseband frequencies. The direct conversion receiver system includes a frequency translator having first and second inputs and an output. The first frequency is preferably an nth order subharmonic of the second frequency, wherein n is an integer greater than 1. A low pass filter is integral with or inherent to the first input and a high pass filter is integral with or inherent to the second input. A direct conversion receiver system is also provided in which a first input signal at a first frequency is applied to a first input port of a multiplier, and a second input signal at a second frequency equal to about 1/n times the first frequency wherein n is an integer, is applied to a second input port of the multiplier. A first filter coupled to the first input port is configured to substantially filter out any leakage at the second frequency which may be present. A second filter is configured to substantially filter out any leakage at the first frequency which may be present. The multiplier is configured to produce a signal at an output port thereof which is derived from the product of the first and second signals.

Abstract translation: 一种具有接收机部分和发射机部分的多频带收发机，其中所述接收机部分包括用于将信号直接下变频到基带频率的方向转换系统。 直接转换接收机系统包括具有第一和第二输入和输出的频率转换器。 第一频率优选地是第二频率的第n次次谐波，其中n是大于1的整数。低通滤波器与第一输入一体或固有，并且高通滤波器与第二输入集成或固有 。 还提供了一种直接转换接收机系统，其中以第一频率的第一输入信号被施加到乘法器的第一输入端口，第二输入信号以等于第一频率的大约1 / n倍的第二输入信号，其中n 是一个整数，被应用到乘法器的第二个输入端口。 耦合到第一输入端口的第一滤波器被配置为基本上滤除可能存在的第二频率处的任何泄漏。 第二滤波器被配置为基本上滤除可能存在的第一频率处的任何泄漏。 乘法器被配置为在其输出端口处产生从第一和第二信号的乘积导出的信号。