High-frequency signal receiver
    14.
    发明授权
    High-frequency signal receiver 失效
    高频信号接收机

    公开(公告)号:US07187733B2

    公开(公告)日:2007-03-06

    申请号:US10413652

    申请日:2003-04-15

    IPC分类号: H04L27/08

    CPC分类号: H03G3/3068

    摘要: A high-frequency signal receiver includes a variable gain amplifier for amplifying a high frequency signal input thereto, a local oscillator, a mixer for mixing a signal output from the variable gain amplifier and a signal output from the local oscillator, a filter for receiving a signal output from the mixer, a gain controller for outputting a voltage according to the signal output from the mixer; and a weighting circuit for weighting and summing a control voltage and the signal output from the gain controller for controlling the gain of the variable gain amplifier. The high-frequency signal receiver hence creates a small amount of signal error even when the input signal includes a large interference signal adjacent to a desired signal.

    摘要翻译: 高频信号接收机包括用于放大输入到其中的高频信号的可变增益放大器,本地振荡器,用于混合从可变增益放大器输出的信号和从本地振荡器输出的信号的混频器,用于接收 来自混频器的信号输出;增益控制器,用于根据从混频器输出的信号输出电压; 以及用于对控制电压进行加权和求和并从增益控制器输出的信号用于控制可变增益放大器的增益的加权电路。 因此,即使当输入信号包括与期望信号相邻的大的干扰信号时,高频信号接收器也产生少量的信号误差。

    ZnO-Pd composite catalyst and production method thereof
    17.
    发明授权
    ZnO-Pd composite catalyst and production method thereof 失效
    ZnO-Pd复合催化剂及其制备方法

    公开(公告)号:US6099695A

    公开(公告)日:2000-08-08

    申请号:US910207

    申请日:1997-08-13

    摘要: A ZnO--Pd composite catalyst wherein Pd is dispersed and fixed on the surface of ZnO is produced by ion adsorption process having the steps of soaking ZnO in an acid solution of Pd to adsorb Pd ions (Pd.sup.2+) onto the surface of ZnO; and reducing the adsorbed Pd ions to metallic Pd particles so that the metallic Pd particles are substantially evenly deposited on the surface of ZnO. The ZnO--Pd composite catalyst provides a stable and continuing CO oxidizing capability, without light irradiation, even when the air to be treated contains sulfur compounds such as H.sub.2 S and SOx.

    摘要翻译: 通过离子吸附法制备了Pd分散固定在ZnO表面的ZnO-Pd复合催化剂,其工序有:将ZnO浸入Pd的酸性溶液中,将Pd离子(Pd2 +)吸附到ZnO的表面上; 并将吸附的Pd离子还原成金属Pd颗粒,使得金属Pd颗粒基本上均匀地沉积在ZnO的表面上。 即使待处理的空气含有硫化合物如H 2 S和SO x,ZnO-Pd复合催化剂提供了稳定且持续的CO氧化能力,而不需要光照射。