公开(公告)号：US07035611B2

公开(公告)日：2006-04-25

申请号：US10079057

申请日：2002-02-19

申请人： Eric R. Garlepp ,  Donald A. Kerth ,  Richard T. Behrens ,  Jeffrey W. Scott ,  G. Diwakar Vishakhadatta ,  G. Tyson Tuttle ,  Vishnu S. Srinivasan

发明人： Eric R. Garlepp ,  Donald A. Kerth ,  Richard T. Behrens ,  Jeffrey W. Scott ,  G. Diwakar Vishakhadatta ,  G. Tyson Tuttle ,  Vishnu S. Srinivasan

IPC分类号： H04B1/06

CPC分类号： H04B1/0003 ,  H04B1/28 ,  H04B1/406 ,  H04B15/02 ,  H04B15/04 ,  H04B2215/064

摘要： A radio-frequency (RF) apparatus includes front-end circuitry. The front-end circuitry includes a filter circuitry and an impedance matching circuitry. The filter circuitry has a differential output that has an output impedance. The filter circuitry filters signals outside a signal band of interest. The impedance matching network has a differential input coupled to the output of the filter circuitry. The impedance matching network also has a differential output coupled to a signal processing circuitry. The signal processing circuitry has an input impedance. The impedance matching network matches the input impedance of the signal processing circuitry to the output impedance of the filter circuitry.

公开(公告)号：US07333831B2

公开(公告)日：2008-02-19

申请号：US11231182

申请日：2005-09-20

申请人： Vishnu S. Srinivasan ,  Gary B. Levy ,  Brett O. Mitchelson ,  Donald A. Kerth ,  Eric R. Garlepp ,  G. Tyson Tuttle

发明人： Vishnu S. Srinivasan ,  Gary B. Levy ,  Brett O. Mitchelson ,  Donald A. Kerth ,  Eric R. Garlepp ,  G. Tyson Tuttle

IPC分类号： H04B1/18

CPC分类号： H04B1/006

摘要： Interchangeable high band low-noise-amplifiers (LNAs) and low band low-noise-amplifiers (LNAs) and related methods are disclosed that greatly enhance the efficiency of designing handsets for different combinations of frequency bands. The input signals to particular pins on a receiver or transceiver integrated circuit (IC) are swappable such that multiple frequency bands can be input to the same input pins thereby allowing for simplified system design. Efficient programmable techniques are also disclosed for controlling a swap mode within communication ICs. These interchangeable or band swappable input paths, for example, can be utilized to allow interchangeability between high band (PCS, DCS) and low band (GSM, E-GSM) inputs for cellular communications. In this way, for example, handset manufacturers can build a single printed circuit board (PCB) that can be utilized for cellular communications in the United States of America, where 850 MHz (GSM) and 1900 MHz (PCS) bands are utilized, and in Europe, wherein 900 MHz (E-GSM) and 1800 MHz (DCS) bands are utilized.

摘要翻译： 公开了可互换的高频带低噪声放大器（LNA）和低频带低噪声放大器（LNA）及相关方法，这大大提高了针对不同频带组合设计手机的效率。 接收器或收发器集成电路（IC）上的特定引脚的输入信号是可交换的，使得可以将多个频带输入到相同的输入引脚，从而允许简化的系统设计。 还公开了用于控制通信IC内的交换模式的高效可编程技术。 例如，这些可互换或频带可交换的输入路径可用于允许用于蜂窝通信的高频带（PCS，DCS）和低频（GSM，E-GSM）输入之间的互换性。 以这种方式，例如，手机制造商可以构建可用于在美国使用850MHz（GSM）和1900MHz（PCS）频带的美国的蜂窝通信的单个印刷电路板（PCB），以及 在欧洲，其中使用900MHz（E-GSM）和1800MHz（DCS）频带。