Interpolative D/A converter
    1.
    发明授权
    Interpolative D/A converter 失效
    内插D / A转换器

    公开(公告)号:US4652858A

    公开(公告)日:1987-03-24

    申请号:US852749

    申请日:1986-04-16

    摘要: An oversampling type digital-to-analog converter which has a light gradient overload and a high signal-to-noise ratio in spite of a comparatively low sampling frequency.In a digital-to-analog converter wherein the difference between an oversampled digital input signal and a feedback signal is taken, such differences are integrated, the integral value is quantized to obtain the feedback signal, and part of the feedback signal is used as an analog output signal; a circuit for the quantization is constructed of a circuit which converts the integral value into a digital signal smaller in the number of bits than the digital input signal, and the feedback signal is obtained by integrating the outputs of the quantization circuit by means of a digital integral circuit.

    摘要翻译: 尽管采样频率相对较低,但过采样型数模转换器具有光梯度过载和高信噪比。 在采用过采样数字输入信号和反馈信号之间的差分的数模转换器中,积分这样的差值,对积分值进行量化以获得反馈信号,反馈信号的一部分被用作 模拟输出信号; 用于量化的电路由将积分值转换成数字信号比数字输入信号更小的数字信号的电路构成,反馈信号是通过将数字量化电路 积分电路。

    PCM coder and decoder having function of two-wire/four-wire conversion
    2.
    发明授权
    PCM coder and decoder having function of two-wire/four-wire conversion 失效
    PCM编码器和解码器具有双线/四线转换功能

    公开(公告)号:US4796296A

    公开(公告)日:1989-01-03

    申请号:US739295

    申请日:1985-05-30

    IPC分类号: H04B1/58 H04B3/23

    CPC分类号: H04B3/23 H04B1/586

    摘要: A CODEC including a coder and decoder to construct the subscriber's circuit of a digital telephone switching system or the like, wherein an analogue balancing circuit is provided between the output terminal of a post-filter and the input terminal of a pre-filter in order to effectively eliminate a return signal in the case of two-wire/four-wire conversion, and return signals not eliminated by the analogue balancing circuit are further eliminated by a digital balancing circuit.Especially in the present invention, the analogue balancing circuit is so constructed that its characteristics are independent of frequencies, and hence, the analogue balancing circuit and the digital balancing circuit are readily implemented as an LSI.

    摘要翻译: 包括编码器和解码器的编解码器构成数字电话交换系统等的用户电路,其中模拟平衡电路设置在后置滤波器的输出端和预滤波器的输入端之间,以便 在双线/四线转换的情况下有效地消除了返回信号,并且数字平衡电路进一步消除了模拟平衡电路未消除的返回信号。 特别是在本发明中,模拟平衡电路被构造为使其特性与频率无关,因此模拟平衡电路和数字平衡电路容易实现为LSI。

    PCM coder and decoder circuit having digital balancing network
    3.
    发明授权
    PCM coder and decoder circuit having digital balancing network 失效
    PCM编码器和解码电路具有数字平衡网络

    公开(公告)号:US4787080A

    公开(公告)日:1988-11-22

    申请号:US894861

    申请日:1986-08-08

    CPC分类号: H04M3/005 H04B3/23

    摘要: A PCM coder and decoder circuit for use in a subscriber line interface circuit of a telephone communication system has a digital balancing network for removing any echo signal. The digital balancing network is formed by series-connecting a first balancing circuit having characteristics corresponding to the fixed characteristics of a coder, decoder, etc. and a second balancing circuit having characteristics corresponding to variable characteristics of an external circuit including two-wire transmission line which is connected to the coder and decoder circuit. Thus, a replica of an echo signal is precisely produced, and the circuit configuration is simplified.

    摘要翻译: 用于电话通信系统的用户线接口电路中的PCM编码器和解码器电路具有用于去除任何回波信号的数字平衡网络。 数字平衡网络通过串联连接具有与编码器,解码器等的固定特性相对应的特性的第一平衡电路和具有对应于包括双线传输线的外部电路的可变特性的特性的第二平衡电路 其连接到编码器和解码器电路。 因此,精确地产生回波信号的复制品,并且简化了电路配置。

    PCM coder-decoder
    4.
    发明授权
    PCM coder-decoder 失效
    PCM编码解码器

    公开(公告)号:US4591827A

    公开(公告)日:1986-05-27

    申请号:US702224

    申请日:1985-02-15

    CPC分类号: H04M3/561 H04J3/14

    摘要: Disclosed is a PCM coder-decoder having a construction such that a digital filter contained originally in the PCM coder-decoder is utilized on the time division basis in order to fold back a digital reception signal to a digital signal transmission side and thus to accomplish interruption, communication exchange between three parties, gain control, fold-over test of the PCM signal, and so forth, in addition to the coding and decoding functions inherent to the PCM coder-decoder.

    摘要翻译: 公开了一种PCM编码器解码器,其结构使得最初在PCM编码器 - 解码器中包含的数字滤波器在时间分割的基础上被使用,以便将数字接收信号折回到数字信号发送侧,从而完成中断 ,三方之间的通信交换,增益控制,PCM信号的折叠测试等等,以及PCM编码器 - 解码器固有的编码和解码功能。

    Repeater and PLL circuit
    5.
    发明授权
    Repeater and PLL circuit 失效
    中继器和PLL电路

    公开(公告)号:US5052022A

    公开(公告)日:1991-09-24

    申请号:US378281

    申请日:1989-07-11

    摘要: A PLL circuit for generating an AC output signal synchronized with an AC input signal applied thereto with a phase offset with respect to the input signal includes, in one embodiment, a charge pump circuit capable of varying the phase offset depending on the frequency of the AC input signal. In a signal transmission network system including a plurality of nodes coupled to a signal transmission line and distanced from one another by various repeat lengths of transmission path, each node has a repeater including such PLL circuit to suppress jitter caused by individual repeat length of transmission over the transmission line and still remaining in an equalized AC signal in each node.

    摘要翻译: 用于产生与施加到其上的相对于输入信号相位偏移的AC输入信号同步的AC输出信号的PLL电路在一个实施例中包括能够根据AC的频率改变相位偏移的电荷泵电路 输入信号。 在包括耦合到信号传输线并且通过传输路径的各种重复长度的彼此远离的多个节点的信号传输网络系统中,每个节点具有包括这样的PLL电路的中继器,以抑制由各个重复传输长度引起的抖动 传输线并且仍然保持在每个节点中的均衡的AC信号中。

    Electron beam adjusting device with magnet rings of differing alnico
powdered metal content
    10.
    发明授权
    Electron beam adjusting device with magnet rings of differing alnico powdered metal content 失效
    具有不同金属粉末金属含量的磁环的电子束调节装置

    公开(公告)号:US5289149A

    公开(公告)日:1994-02-22

    申请号:US849371

    申请日:1992-05-04

    CPC分类号: H01J29/703 H01J29/823

    摘要: The present invention relates to an electron beam adjusting device which is attached around the neck of a color picture tube, a CRT display, etc., and aims at providing an electron beam adjusting device in which each pair of constituent magnets can be readily magnetized with minimal magnetization variations and which is less costly. The present invention provides an electron beam adjusting device having pairs of two-, four- and six-pole ring-shaped magnets formed of an alnico metal system bonded magnet material, which are attached around the neck of a cathode-ray tube, wherein the two-pole ring-shaped magnets and the four- and six-pole ring-shaped magnets are made of respective bonded magnet materials which are different in the alnico metal magnetic powder content.

    摘要翻译: PCT No.PCT / JP91 / 01385 Sec。 371日期:1992年5月4日 102(e)日期1992年5月4日PCT提交1991年10月11日PCT公布。 出版物WO91 / 01385 日期1991年10月11日。本发明涉及一种电子束调节装置,其安装在彩色显像管的颈部,CRT显示器等上,目的在于提供一种电子束调节装置,其中每对 组分磁体可以以最小的磁化变化容易地磁化,并且成本较低。 本发明提供了一种电子束调节装置,其具有由阴极射线管的颈部附接的由铝镍钴金属系粘合的磁体材料形成的成对的二,四极和六极环形磁体,其中, 两极环形磁体和四极和六极环形磁体由各种粘结磁体材料制成,其不同于镍氢磁铁粉末含量。