公开(公告)号：WO0135529A3

公开(公告)日：2001-10-11

申请号：PCT/US0031065

申请日：2000-11-13

Applicant: GLOBAL COMM TECHNOLOGY INC

Inventor： LEE KYEONGHO ,  JEONG DEOG-KYOON ,  PARK JOONBAE ,  KIM WONCHAN

IPC: H03H11/22 ,  H03L7/089 ,  H03L7/099 ,  H03L7/197 ,  H04B1/28 ,  H04L27/00 ,  H02K7/10 ,  H02K13/02 ,  H02K21/22 ,  H03D3/18 ,  H03D3/24 ,  H03K5/08 ,  H04B1/06 ,  H04B1/38 ,  H04L27/04 ,  H04L27/06 ,  H04L27/08

CPC classification number: H03L7/0995 ,  H03F2200/372 ,  H03H11/22 ,  H03H2011/0494 ,  H03L7/0891 ,  H03L7/1974 ,  H04B1/28 ,  H04B1/40

Abstract: The RF communication system includes an antenna that receives/transmits RF signals, a PLL (730) that generates multi-phase clock signals having a frequency different from a carrier frequency and a reference signal having a carrier frequency, a demodulation-mixer (720) that mixes the received RF signals with the multi-phase clock signals having the frequency different from the carrier frequency to output signals having a frequency reduced relative to the carrier frequency, two stage amplification (740, 750) that amplifies a selected channel signal to a required dynamic level, and an A/D converting unit (770 A) for converting the RF signals from the mixing unit into digital signals. The two stage amplification can provide the selected channel signal with sufficient gain, even when an adjacent channel signal is output by the demodulation mixer (720) with greater amplitude or power.

Abstract translation: RF通信系统包括接收/发送RF信号的天线，产生具有与载波频率不同的频率的多相时钟信号的PLL（730）和具有载波频率的参考信号，解调混频器（720） ，其将接收到的RF信号与具有与载波频率不同的频率的多相时钟信号混合，以输出具有相对于载波频率降低的频率的信号;两级放大（740,750），其将选择的信道信号放大为 所需的动态电平以及用于将来自混合单元的RF信号转换为数字信号的A / D转换单元（770A）。 即使当解调混频器（720）以较大的幅度或功率输出相邻信道信号时，两级放大也可以为选定的信道信号提供足够的增益。