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    • 4. 发明授权
    • Transmitter and wireless communication apparatus using same
    • 发射机和无线通信装置使用它
    • US07515648B2
    • 2009-04-07
    • US11017076
    • 2004-12-21
    • Taizo YamawakiMasahiro ItoMasumi KasaharaHiroaki Matsui
    • Taizo YamawakiMasahiro ItoMasumi KasaharaHiroaki Matsui
    • H04K1/02
    • H04L27/0008H03F1/02H03F3/24H04B2001/045
    • A transmitter that can reduce noise without using an SAW filter whose IC integration is hard, and copes with two modulation formats of constant envelope modulation and non-constant envelope modulation, and a downsized and low-cost wireless communication apparatus that uses the transmitter are provided. The transmitter includes a quadrature modulator that modulates an input signal by quadrature modulation, a first amplifier that amplifies a modulation signal outputted by the quadrature modulator, and a second amplifier that amplifies an output signal of the first amplifier. The first amplifier operates as a limiter when the modulation format is the constant envelope modulation, and performs linear operation when the modulation format is the non-constant envelope modulation.
    • 提供一种能够在不使用集成硬件的SAW滤波器的情况下降低噪声的发射机,并且应用恒定包络调制和非恒定包络调制的两种调制格式,以及使用发射机的小型化和低成本的无线通信装置 。 发射机包括通过正交调制来调制输入信号的正交调制器,放大由正交调制器输出的调制信号的第一放大器和放大第一放大器的输出信号的第二放大器。 当调制格式为恒定包络调制时,第一放大器用作限幅器,并且当调制格式是非恒定包络调制时,执行线性运算。
    • 5. 发明授权
    • communication semiconductor integrated circuit device and wireless communication system
    • 通信半导体集成电路器件和无线通信系统
    • US07239855B2
    • 2007-07-03
    • US10816817
    • 2004-04-05
    • Hiroaki MatsuiKazuaki Hori
    • Hiroaki MatsuiKazuaki Hori
    • H04B1/04
    • H04B1/0057H04B1/005H04B1/406
    • A communication semiconductor integrated circuit device is capable of transmission in two or more different modulation modes and outputting transmission signals with less distortion. The communication semiconductor integrated circuit device comprises a gain variable amplification circuit which amplifies I-signals and Q-signals; and a mixer circuit which synthesizes the amplified I-signals and Q-signals and local oscillation signals to carry out modulation and frequency conversion. The communication semiconductor integrated circuit device is capable of transmission in two or more different modulation methods, for example, in GSM mode and EDGE mode. A low-pass filter of second or higher order is placed between the gain variable amplification circuit and the mixer circuit.
    • 通信半导体集成电路器件能够以两种或更多种不同的调制模式传输并输出具有较小失真的传输信号。 通信半导体集成电路装置包括放大I信号和Q信号的增益可变放大电路; 以及混合电路,其合成放大的I信号和Q信号以及本地振荡信号,以进行调制和频率转换。 通信半导体集成电路器件能够以两种或更多种不同的调制方式进行传输,例如在GSM模式和EDGE模式中。 在增益可变放大电路和混频电路之间放置第二级或更高级的低通滤波器。
    • 6. 发明授权
    • Reversible thermosensitive coloring composition and recording material using the composition and recording method using the recording material
    • 使用该记录材料的组合物和记录方法的可逆热敏着色组合物和记录材料
    • US06503868B2
    • 2003-01-07
    • US09771129
    • 2001-01-26
    • Masafumi ToriiHiroaki MatsuiMasaru Shimada
    • Masafumi ToriiHiroaki MatsuiMasaru Shimada
    • B41M530
    • B41M5/305B41M5/3335B41M5/3336B41M5/3372B41M5/42
    • A reversible thermosensitive coloring composition including an electron donating coloring agent and an electron accepting color developer, wherein the composition achieves a colored state when heated at a temperature not lower than a coloring temperature and then cooled at a cooling speed (a), and the composition in the colored state achieves a non-colored state when heated at a temperature lower than the coloring temperature and not lower than an erasing temperature, or when heated at a temperature not lower than the coloring temperature and then cooled relatively slowly compared to the cooling speed (a), and wherein the electron accepting color developer includes a phenolic compound having the following formula (1): wherein n is an integer of from 1 to 3; m is an integer of from 1 to 20; r is 0 or an integer of from 1 to 3; X and Y independently represent a divalent group including a hetero atom; R1 represents a hydrocarbon group having from 1 to 20 carbon atoms; and R2 represents a hydrocarbon group having from 2 to 20 carbon atoms. A reversible thermosensitive recording material having a recording layer including the composition is also provided. In addition, a reversible thermal recording method using the reversible thermosensitive recording material is also provided.
    • 一种包含给电子着色剂和电子接受显色剂的可逆热敏着色组合物,其中当在不低于着色温度的温度下加热时,所述组合物达到着色状态,然后以冷却速度(a)冷却,并且组合物 在着色状态下,在低于着色温度且不低于擦除温度的温度下加热时,或者在不低于着色温度的温度下加热,然后相对于冷却速度相对缓慢地冷却,达到无色状态 (a),其中所述电子接受显色剂包括具有下式(1)的酚类化合物:其中n为1至3的整数; m为1〜20的整数, r为0或1〜3的整数; X和Y独立地表示包括杂原子的二价基团; R1表示碳原子数1〜20的烃基; R2表示碳原子数2〜20的烃基。 还提供了具有包含该组合物的记录层的可逆热敏记录材料。 此外,还提供了使用可逆热敏记录材料的可逆热记录方法。
    • 10. 发明授权
    • Semiconductor integrated circuit for communication
    • 半导体集成电路通讯
    • US08315579B2
    • 2012-11-20
    • US12917135
    • 2010-11-01
    • Ryoji FuruyaKazuhisa OkadaHiroaki Matsui
    • Ryoji FuruyaKazuhisa OkadaHiroaki Matsui
    • H04B1/04H04B1/00
    • H03D3/007H03C3/40H03D7/1433H04B1/406
    • The present invention provides a semiconductor integrated circuit for communication (RF IC) realizing high yield without deteriorating a carrier leak characteristic even when a modulation circuit is formed by using cheep parts with large variations. In a semiconductor integrated circuit (RF IC) including: an input circuit constructed by a differential amplifier circuit and a level shifter, which is provided on the ante stage of a mixer of a differential circuit called a Gilbert Cell; and a modulation circuit that performs modulation by adding an I/Q signal and a carrier wave signal, a calibration circuit for canceling a DC offset in an output of the input circuit is provided.
    • 本发明提供了一种用于通信(RF IC)的半导体集成电路,即使在通过使用具有大变化的尖峰部分形成调制电路时,也能实现高产率而不劣化载波泄漏特性。 一种半导体集成电路(RF IC),包括:由差分放大电路和电平移位器构成的输入电路,其设置在称为吉尔伯特细胞的差分电路的混频器的前端; 以及通过添加I / Q信号和载波信号来执行调制的调制电路,提供了用于消除输入电路的输出中的DC偏移的校准电路。