公开(公告)号：US20050079849A1

公开(公告)日：2005-04-14

申请号：US10791850

申请日：2004-03-04

申请人： Yoo Na ,  Won Baek ,  Ki Choi ,  Seung Seo ,  Seung Oh

发明人： Yoo Na ,  Won Baek ,  Ki Choi ,  Seung Seo ,  Seung Oh

IPC分类号： H03D7/00 ,  H03L7/18 ,  H04B1/16 ,  H04B1/26 ,  H04B1/28 ,  H04B1/30 ,  H03L7/00 ,  H04B15/00

CPC分类号： H04B1/005 ,  H04B1/28 ,  H04B1/30

摘要： Disclosed herein is a receiver for down-conversion of a dual band. The receiver can down convert radio frequency signals of two different bands into a desired IF signal using only one voltage controlled oscillator (VCO), by dividing the output of the VCO into a predetermined ratio with a divider. The VCO outputs a desired oscillating frequency for conversion of the first-band RF signal into the IF signal, and the divider divides the desired oscillating frequency in a predetermined ratio to output a frequency for conversion of the second-band RF signal into the IF signal. Thus, the receiver can be formed on one silicon substrate.

摘要翻译： 本文公开了一种用于双频带的下转换的接收机。 接收机可以通过仅使用一个压控振荡器（VCO）将两个不同频带的射频信号下变频成所需的IF信号，通过用分频器将VCO的输出除以预定的比例。 VCO输出期望的振荡频率，用于将第一频带RF信号转换成IF信号，并且分频器以预定比例分割期望的振荡频率，以输出用于将第二频带RF信号转换成IF信号的频率 。 因此，接收器可以形成在一个硅衬底上。

公开(公告)号：US20060154640A1

公开(公告)日：2006-07-13

申请号：US11089226

申请日：2005-03-24

申请人： Seung Oh ,  Yoo Na ,  Jeong Choi ,  Seung Seo ,  Moon Kim

发明人： Seung Oh ,  Yoo Na ,  Jeong Choi ,  Seung Seo ,  Moon Kim

IPC分类号： H04B1/18 ,  H04B1/10

CPC分类号： H04B1/28

摘要： Disclosed herein are a terrestrial digital multimedia broadcasting (DMB) tuner of a low intermediate frequency (IF) structure which is applied to a mobile communication terminal, such as a mobile phone, and an image rejection mixer applied thereto. In order to improve inter-channel attenuation characteristics, the image rejection mixer locates an oscillation frequency above or beneath the frequency of a target signal to include an image signal of the target signal in a terrestrial DMB band, mixes a radio frequency (RF) signal with the oscillation frequency, and outputs the resulting IF signals to a polyphase filter in a selected arrangement. Because the image signal of the target signal is included in the terrestrial DMB band, the image rejection mixer can satisfy the inter-channel attenuation characteristics without a troublesome or complex design.

摘要翻译： 这里公开了应用于诸如移动电话的移动通信终端和应用于其的镜像抑制混合器的低中频（IF）结构的地面数字多媒体广播（DMB）调谐器。 为了提高信道间衰减特性，图像抑制混频器将振荡频率定位在目标信号的频率之上或之下，以包括地面DMB频带中的目标信号的图像信号，将射频（RF）信号 并以所选择的布置将所得IF信号输出到多相滤波器。 由于目标信号的图像信号被包含在地面DMB频带中，因此，图像抑制混频器可以满足信道间衰减特性，而不需要麻烦或复杂的设计。