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191 条记录 (耗时 0.029 秒)

    Pulse width modulation amplifier circuit
    31.
    发明授权
    Pulse width modulation amplifier circuit 失效
    脉宽调制放大电路

    公开(公告)号：US4949048A

    公开(公告)日：1990-08-14

    申请号：US433234

    申请日：1989-11-08

    申请人： Akio Tokumo ,  Masayuki Kato ,  Takeshi Sato ,  Tatsuzo Hasegawa

    发明人： Akio Tokumo ,  Masayuki Kato ,  Takeshi Sato ,  Tatsuzo Hasegawa

    IPC分类号： H03F1/56 ,  H03F3/217 ,  H03F3/68

    CPC分类号： H03F3/2173 ,  H03F3/2171

    摘要： A pulse width modulation amplifier circuit includes a comparator which receives an analog signal and generates first and second analog signals having a phase difference of 180 degrees. A phase shifting circuit produces first and second triangular wave carrier signals so as to establish therebetween a phase difference of approximately 90 degrees. First and second pulse width modulation amplifiers, having output terminals connected to a load, pulse width modulate the first and second triangular wave carrier signals with said first and second analog signals, respectively, and amplify resultant pulse width signals.

    摘要翻译： 脉宽调制放大器电路包括一个接收模拟信号并产生具有180度相位差的第一和第二模拟信号的比较器。 相移电路产生第一和第二三角波载波信号，以便在其间建立大约90度的相位差。 具有连接到负载的输出端子的第一和第二脉冲宽度调制放大器分别用所述第一和第二模拟信号对脉冲宽度调制第一和第二三角波载波信号，并放大合成脉冲宽度信号。

    Imidazoisoquinoline compounds useful as anti-ulcerative agents
    34.
    发明授权
    Imidazoisoquinoline compounds useful as anti-ulcerative agents 失效
    咪唑并异喹啉化合物可用作抗溃疡剂

    公开(公告)号：US4738967A

    公开(公告)日：1988-04-19

    申请号：US945788

    申请日：1986-12-23

    申请人： Ikuo Ueda ,  Youichi Shiokawa ,  Masayuki Kato ,  Nobukiyo Konishi ,  Atsushi Akahane

    发明人： Ikuo Ueda ,  Youichi Shiokawa ,  Masayuki Kato ,  Nobukiyo Konishi ,  Atsushi Akahane

    IPC分类号： C07D471/04 ,  A61K31/47 ,  A61P1/04 ,  C07D487/04 ,  A61K31/40

    CPC分类号： C07D487/04

    摘要： A compound of the formula: ##STR1## wherein R.sup.1 is lower alkyl,R.sup.3 is hydrogen, halogen or ar(lower)alkoxy, andR is lower alkanoyl, nitroso, amino, carboxy, esterified carboxy, carbamoyl, hydroxycarbamoyl, haloformyl, aminomethyleneamino which may be substituted with cyano or lower alkyl, iminomethylamino which may be substituted with cyano or lower alkyl, or a group of the formula: --A--R.sup.2 in which A is lower alkylene andR.sup.2 is di(lower) alkylamino, cyano, lower alkoxy, N-containing heterocyclic group which may have suitable substituent(s), lower alkynyloxy, lower alkenyloxy, lower alkylthio, amino(lower)alkylthio, lower alkylsulfinyl, lower alkylsulfonyl, carboxy, esterified carboxy, carbamoyl, hydroxycarbamoyl, hydroxy, lower alkanoyloxy, heterocyclicamino(lower)alkylthio having two oxo groups, hydrogen or a group of the formula: ##STR2## in which R.sup.4, R.sup.5 and R.sup.6 are each lower alkyl andX is an acid residue,and pharmaceutically acceptable salts thereof. pa The compounds are useful as anti ulcer agents.

    Automatic graphic equalizer
    36.
    发明授权
    Automatic graphic equalizer 失效
    自动图形均衡器

    公开(公告)号：US4688258A

    公开(公告)日：1987-08-18

    申请号：US793384

    申请日：1985-10-31

    申请人： Yoshiro Kunugi ,  Shinichi Suzuki ,  Masayuki Kato

    发明人： Yoshiro Kunugi ,  Shinichi Suzuki ,  Masayuki Kato

    IPC分类号： H03G5/16 ,  H04R3/04

    CPC分类号： H03G5/165

    摘要： An automatic graphic equalizer for a sound system has circuitry for measuring the effect of the physical environment receiving a sound on the frequency characteristics of the sound, and for adjusting the characteristics of a graphic equalizer to compensate for distortions in the desired flat frequency response caused by the physical environment. The circuitry includes a pink noise generator supplying pink noise to the graphic equalizer during an initialization operation, the graphic equalizer being controlled by a controller to present a flat frequency characteristic. The equalizer output is sent to a speaker which supplies the pink noise as a sound signal to the selected environment. A microphone picks up the sound in the selected environment and converts it to an electrical signal which is supplied through an ALC amplifier to a frequency-variable band-pass filter to detect the signal level in each of the equalizer frequency bands. The level signals are smoothed in a level detector and digitized to be input to the controller which readjusts the graphic equalizer to compensate for distortions in the desired flat frequency response caused by the selected environment.

    摘要翻译： 用于声音系统的自动图形均衡器具有用于测量接收声音的物理环境对声音的频率特性的影响的电路，并且用于调整图形均衡器的特性以补偿由所产生的期望的平坦频率响应引起的失真 物理环境。 电路包括在初始化操作期间向图形均衡器供应粉红噪声的粉红噪声发生器，图形均衡器由控制器控制以呈现平坦的频率特性。 均衡器输出被发送到扬声器，扬声器将粉红噪声作为声音信号提供给所选择的环境。 麦克风拾取所选择的环境中的声音，并将其转换为通过ALC放大器提供的电信号到频率可变带通滤波器，以检测每个均衡器频带中的信号电平。 电平信号在电平检测器中被平滑，并被数字化以输入到控制器，其重新调整图形均衡器以补偿由所选择的环境引起的期望的平坦频率响应中的失真。