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    • 53. 发明授权
    • Direct-conversion transmitter circuit and transceiver system
    • 直接转换发射机电路和收发器系统
    • US07702359B2
    • 2010-04-20
    • US11703166
    • 2007-02-07
    • Satoshi TanakaTaizo YamawakiKazuaki HoriKazuo Watanabe
    • Satoshi TanakaTaizo YamawakiKazuaki HoriKazuo Watanabe
    • H04M1/00
    • H03D3/007H03C3/40H04B1/30
    • Disclosed is a direct conversion type transmitter or transceiver circuit suitable for a mobile communication device which corresponds to broad signal output level variable width to be required by W-CDMA, which does not necessitate any high-performance low noise VCO and RF filter, capable of reducing a number of components and the cost. In the input portion of an orthogonal modulator composed of a divider, mixers, and a common load, there are provided variable attenuators. If an input signal level of the orthogonal modulator within the transmitter circuit lowers, this variable attenuator circuit is operated so as to lower the bias of the orthogonal modulator to reduce the amount of occurrence of carrier leak, and to prevent the signal during low output level and carrier leak ratio from being deteriorated. The direct conversion transmitter circuit is capable of easily realizing output level variable width of 70 dB or higher and reducing a variable amount in the high frequency circuit in which it is difficult to secure the variable gain width.
    • 公开了一种适用于移动通信设备的直接转换型发射器或收发器电路,其对应于由W-CDMA所要求的宽信号输出电平可变宽度,其不需要任何高性能低噪声VCO和RF滤波器,其能够 减少了一些组件和成本。 在由分频器,混频器和公共负载组成的正交调制器的输入部分中,提供可变衰减器。 如果发射机电路内的正交调制器的输入信号电平降低,则该可变衰减器电路被工作,以降低正交调制器的偏置,以减少载波泄漏的发生量,并且防止在低输出电平期间的信号 并且载体泄漏率不劣化。 直接变换发送电路能够容易地实现70dB以上的输出电平可变宽度,并且在难以确保可变增益宽度的高频电路中减少可变量。
    • 60. 发明申请
    • Heat-sensitive recording body
    • 热敏记录体
    • US20070173406A1
    • 2007-07-26
    • US11578790
    • 2005-04-21
    • Kazuo WatanabeKeiichi Inubushi
    • Kazuo WatanabeKeiichi Inubushi
    • B41M5/24
    • B41M5/3372B41M2205/04
    • A heat-sensitive recording material comprising a substrate and a heat-sensitive recording layer, the heat-sensitive recording layer containing a leuco dye, a developer, and a copolymer resin emulsion, the copolymer resin emulsion comprising a copolymer resin, the copolymer resin (1) containing (i) (meth)acrylonitrile, and (ii) one or more vinyl monomers copolymerizable with (meth)acrylonitrile, and (2) having a solubility parameter of 12.0 or higher, above mentioned vinyl monomers (ii) include at least a carboxyl group-containing vinyl monomer, and said at least a carboxyl group-containing vinyl monomer is 1 to 10 mass % of the total mass of the copolymer resin.
    • 一种热敏记录材料,包括基材和热敏记录层,所述热敏记录层含有无色染料,显色剂和共聚物树脂乳液,所述共聚物树脂乳液包含共聚物树脂,共聚物树脂 1)含(i)(甲基)丙烯腈,和(ii)可与(甲基)丙烯腈共聚的一种或多种乙烯基单体和(2)溶解度参数为12.0以上的上述乙烯基单体(ii) 含羧基的乙烯基单体,所述至少含羧基的乙烯基单体为共聚物树脂总质量的1〜10质量%。