公开(公告)号：US20060068746A1

公开(公告)日：2006-03-30

申请号：US10956778

申请日：2004-09-30

申请人： Shen Feng ,  Madjid Hafizi ,  Qizheng Gu ,  Robert Ruth ,  Richard Schwab ,  Taoling Fu ,  Kim Schulze ,  Per Karlsen

发明人： Shen Feng ,  Madjid Hafizi ,  Qizheng Gu ,  Robert Ruth ,  Richard Schwab ,  Taoling Fu ,  Kim Schulze ,  Per Karlsen

IPC分类号： H04B1/26 ,  H04B15/00

CPC分类号： H04B1/30

摘要： An integrated circuit includes an RF receiver has a direct-conversion down-converter and demodulator architecture with an integrated low noise amplifier (LNA) for operation in a frequency band of interest (cellular) and provisions for an off-chip LNA for operation in a second (higher) frequency band of interest (such as PCS). A baseband processor includes high-dynamic variable gain amplifiers and 7th-order elliptic low-pass filters. The IC also includes a 4 GHz PLL frequency synthesizer and a three wire series interface to external digital baseband circuits, such as a digital signal processor.

摘要翻译： 一种集成电路包括RF接收机，其具有用于在感兴趣的频带（蜂窝）中操作的集成低噪声放大器（LNA）的直接转换下变频器和解调器架构，并且为片外LNA提供操作 感兴趣的第二（更高）频带（例如PCS）。 基带处理器包括高动态可变增益放大器和7阶椭圆低通滤波器。 该IC还包括一个4 GHz PLL频率合成器和一个三线串行接口，用于外部数字基带电路，如数字信号处理器。

公开(公告)号：US06834182B2

公开(公告)日：2004-12-21

申请号：US09774788

申请日：2001-01-31

申请人： Taoling Fu

发明人： Taoling Fu

IPC分类号： H04B1700

CPC分类号： H04W52/226 ,  H04B17/354 ,  H04W52/16 ,  H04W52/225

摘要： A method for operating a mobile station includes steps of (A) operating an RF transmitter power detector to obtain an output signal that is indicative of a magnitude of RF power transmitted by the mobile station; (B) processing the output signal to determine a time-varying characteristic of the output signal; and (C) determining a value of the Adjacent Channel Power Ratio (ACPR) from the time-varying characteristic. A further step uses the determined value of the ACPR to control a DC bias current, and therefore the output power capability, of a transmitter amplifier.

摘要翻译： 一种用于操作移动台的方法包括以下步骤：（A）操作RF发射机功率检测器以获得指示由移动台发送的RF功率的大小的输出信号; （B）处理输出信号以确定输出信号的时变特性; 和（C）根据时变特性确定相邻信道功率比（ACPR）的值。 进一步的步骤是使用ACPR的确定值来控制发射机放大器的DC偏置电流以及输出功率能力。