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1. 发明授权

US5896420A Transmission apparatus having echo cancellation facility 失效
标题翻译：具有回波消除装置的发送装置
公开(公告)号：US5896420A
公开(公告)日：1999-04-20
申请号：US749346
申请日：1996-11-21
申请人： Takashi Kaku , Takeshi Asahina , Toyomi Obikawa , Ryoji Okita
发明人： Takashi Kaku , Takeshi Asahina , Toyomi Obikawa , Ryoji Okita
IPC分类号： H03H17/00 , H04B1/58 , H04B3/23 , H04L5/18 , H04L27/00 , H04B3/20
CPC分类号： H04B1/586 , H04B3/23 , H04L27/0002 , H04L5/18
摘要： A transmission apparatus, connected via a hybrid circuit to a line, such as a modulator-demodulator which can perform stable echo cancellation, whether the level of the far-end echo is high or not, provided with a transmission unit which generates a transmission signal to be transmitted to the line via the hybrid circuit, a reception unit which receives the reception signal supplied from the line via the hybrid circuit, and a superimposing means for superimposing the reception signal applied to the hybrid circuit onto the transmission signal. The transmission signal onto which the reception signal is superimposed by the superimposing means is transmitted to the line via the hybrid circuit.
摘要翻译：一种传输装置，其经由混合电路连接到线路，诸如能够执行稳定的回波消除的调制器解调器，远端回波的电平是否高，设置有发送单元，其生成发送信号经由混合电路发送到线路;接收单元，其接收经由混合电路从线路提供的接收信号;以及叠加装置，用于将施加到混合电路的接收信号叠加到发送信号上。通过叠加装置叠加接收信号的发送信号经由混合电路被发送到线路。

2. 发明授权

US5631923A Two-wire full-duplex modem 失效
标题翻译：双线全双工调制解调器
公开(公告)号：US5631923A
公开(公告)日：1997-05-20
申请号：US89190
申请日：1993-07-12
申请人： Takashi Kaku , Toyomi Obikawa
发明人： Takashi Kaku , Toyomi Obikawa
IPC分类号： H04B3/23 , H04L1/22 , H04L5/14 , H04L25/02 , H04L25/06 , H04L27/00 , H04L29/14 , H03D3/24
CPC分类号： H04L25/0262 , H04B3/23 , H04L1/22 , H04L25/068 , H04L5/143
摘要： In a modem, after scrambling data which are time-divided into main data and secondary data, a 2 W-4 W conversion circuit sends the data to the two-wire line. An estimated echo component is subtracted from a signal which is available from the 2 W-4 W conversion circuit. Following this, the signal from the 2 W-4 W conversion circuit is demodulated, descrambled and separated into main data and secondary data. A generator polynomial for scrambling is different from a generator polynomial for descrambling. The modem comprises a line-trouble-detect part which samples data of the secondary channel, by multipoint sampling, to obtain the secondary data and detects the number of inversion points in the descrambled secondary channel data per unit time period. The line-trouble-detect part outputs a line-trouble signal which indicates that there is a trouble on the line if the number of detected inversion points is more than a predetermined number.
摘要翻译：在调制解调器中，在将分组成主数据和次数据的数据进行加扰之后，2W-4W转换电路将数据发送到双线线路。从可从2 W-4 W转换电路获得的信号中减去估计的回波分量。此后，来自2W-4W转换电路的信号被解调，解扰并分离成主数据和次数据。用于扰码的生成多项式与用于解扰的生成多项式不同。调制解调器包括线路故障检测部分，其通过多点采样来对二次信道的数据进行采样，以获得二次数据，并且检测每单位时间段内解扰的次级信道数据中的反转点的数量。线路故障检测部分输出线路故障信号，如果检测到的反转点的数量大于预定数量，则该线路故障信号指示线路上存在故障。

3. 发明授权

US07019611B2 Modem coupling circuit for power-line carrier 失效
标题翻译：用于电力线载波的调制解调器耦合电路
公开(公告)号：US07019611B2
公开(公告)日：2006-03-28
申请号：US10803083
申请日：2004-03-18
申请人： Takashi Kaku , Fumishiro Tsuda , Toshiro Tojo , Toyomi Obikawa , Toshiya Sato , Hideaki Yamauchi , Masahiko Kunii
发明人： Takashi Kaku , Fumishiro Tsuda , Toshiro Tojo , Toyomi Obikawa , Toshiya Sato , Hideaki Yamauchi , Masahiko Kunii
IPC分类号： H01F17/06
CPC分类号： H04B3/56 , H01F19/08 , H01F2019/085 , H01F2038/143 , H04B2203/5425 , H04B2203/547 , H04B2203/5483
摘要： A modem coupling circuit comprising: (a) a transformer 1 having a core 1a including a gap formed therein, primary windings N1a, N1b constituting a bifilar wound coil which is wound around the core 1a, forming a single layer and connected to power lines L1, L2, and a secondary winding N2 connected to a transmitting circuit 2 and a secondary winding N3 connected to a receiving circuit 3, the secondary windings N2, N3 holding the single layer of the primary windings between; (b) a coupling capacitor C1 connected to a middle point between first ends of the primary windings, the first ends being not connected to the power lines L1, L2; (c) current limiting resistances R1a, R1b connected to the primary windings N1a, N1b having a bifilar construction; (d) drive resistances R2a, R2b connected to the secondary winding for transmission N2; and (e) terminating resistances R3a, R3b connected to the secondary winding for reception N3.
摘要翻译：一种调制解调器耦合电路，包括：（a）具有芯1a的变压器1，其中形成有间隙，初级绕组N 1 a，N 1 b构成缠绕在芯1a上的双绕线圈，形成单层连接到与发送电路2连接的电力线L 1，L 2和次级绕组N 2，以及连接到接收电路3的次级绕组N 3，保持单层的次级绕组N 2，N 3 初级绕组之间; （b）连接到初级绕组的第一端之间的中点的耦合电容器C 1，第一端不连接到电力线L 1，L 2; （c）连接到具有双相结构的初级绕组N 1 a，N 1 b的限流电阻R 1 a，R b; （d）连接到用于传输的次级绕组N 2的驱动电阻R 2 a，R 2 b; 和（e）连接到用于接收的次级绕组N 3的端接电阻R 3 a，R 3 b。

4. 发明授权

US06002724A Transmission apparatus and control method therefor 失效
标题翻译：传动装置及其控制方法
公开(公告)号：US06002724A
公开(公告)日：1999-12-14
申请号：US748346
申请日：1996-11-14
申请人： Takashi Kaku , Takeshi Asahina , Toyomi Obikawa , Ryoji Okita
发明人： Takashi Kaku , Takeshi Asahina , Toyomi Obikawa , Ryoji Okita
IPC分类号： H04L27/00 , H04B1/16 , H04J3/06 , H04L7/00 , H04L29/08 , H03H7/30 , H04B1/06 , H04B1/38
CPC分类号： H04J3/0688 , H04L7/0083
摘要： A transmission apparatus such as a modem has a receiving unit which receives information and a clock-supplying unit which supplies a clock signal to the receiving unit. It further has an instantaneous dropout detection unit which detects the occurrence of an instantaneous dropout on the receiving circuit and a clock supply control unit which stops the supply of a clock to the receiving unit for a prescribed amount of time when the instantaneous dropout detection unit detects an instantaneous dropout, the stopping of the clock supply causing holding of receiving parameters and the restarting of clock supply causing restarting of the receiving operation.
摘要翻译：诸如调制解调器的传输设备具有接收信息的接收单元和向接收单元提供时钟信号的时钟提供单元。它还具有一个瞬时压差检测单元，其检测接收电路上的瞬时压差的发生;以及时钟供给控制单元，其在瞬时压差检测单元检测到停止向接收单元提供时钟达预定时间瞬时脱落，停止时钟供应，导致接收参数的保持以及引起重新启动接收操作的时钟供应的重新启动。

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