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    • 62. 发明授权
    • Output swing clamp for USB differential buffer
    • USB差分缓冲器的输出摆幅钳
    • US5808481A
    • 1998-09-15
    • US670879
    • 1996-06-28
    • James E. Thompson
    • James E. Thompson
    • G05F3/24H03K19/003H03K19/0185
    • H03K19/00361G05F3/247
    • The claimed invention is a driver circuit for transmitting data via an output node thereof to a transmission line. The driver circuit includes a first driving device coupled to the output node and a second driving device also coupled to the output node. The driver circuit also includes a clamping device coupled to the output node. The clamping device clamps the output node at a first predetermined voltage level. A termination device is coupled to the output node of the driver circuit. The termination device includes a triggering device and a termination path. The triggering device is coupled to the termination path such that the triggering device causes a current flow via the termination path when a voltage at the output node exceeds a second predetermined voltage level. The second predetermined voltage level is higher than the first predetermined voltage level.
    • 所要求保护的发明是用于经由其输出节点将数据发送到传输线的驱动器电路。 驱动器电路包括耦合到输出节点的第一驱动装置和还耦合到输出节点的第二驱动装置。 驱动器电路还包括耦合到输出节点的钳位装置。 夹紧装置将输出节点钳位在第一预定电压电平。 终端设备耦合到驱动器电路的输出节点。 终端设备包括触发设备和终止路径。 触发装置耦合到终端路径,使得当输出节点处的电压超过第二预定电压电平时,触发装置通过终端路径引起电流流动。 第二预定电压电平高于第一预定电压电平。
    • 63. 发明授权
    • Switching connector apparatus
    • 切换连接器装置
    • US5626485A
    • 1997-05-06
    • US319061
    • 1994-10-06
    • Clarence L. Clyatt, IIIJames E. Thompson
    • Clarence L. Clyatt, IIIJames E. Thompson
    • H01R13/703H01R13/71H01R29/00
    • H01R13/71H01R13/7032
    • A first connector (12, FIG. 2) is constructed so when it is unmated from a second connector (14), front contact devices (32) of the first connector are switched from connections to conductors (16) leading to circuit component (70) to connection to a ground plane (110). The first connector comprises a front insert assembly (22) that includes a plurality of front contact devices (32), and a rear insert assembly (50) that includes a plurality of rear contacts (62). When the second connector fully mates with the first one (FIG. 3), the second connector pushes the front insert assembly to a rearward position (22B), against the force of a spring (40), to cause the front contact devices to mate with the rear contacts. When the second connector unmates from the first one, the spring moves the front insert assembly to the forward position. During forward movement, the front contact devices engage the ground plane (110), to thereby ground the front contact devices when they are not mated to the rear contacts.
    • 当第一连接器(12)从第二连接器(14)不配合时,第一连接器(12,图2)构造成使第一连接器的前接触装置(32)从连接切换到通向电路部件(70)的导体 )连接到接地平面(110)。 第一连接器包括包括多个前接触装置(32)的前插入组件(22)和包括多个后触点(62)的后插入组件(50)。 当第二连接器与第一连接器完全配合时(图3),第二连接器克服弹簧(40)的力将前插入件组件推向后方位置(22B),以使前接触装置相互配合 与后触点。 当第二连接器与第一连接器不配合时,弹簧将前插入件组件移动到向前位置。 在向前运动期间,前接触装置接合接地平面(110),从而当前接触装置不配合到后触点时接地。
    • 64. 发明授权
    • Self compensating spread-spectrum hybrid
    • 自补偿扩频混合
    • US5546421A
    • 1996-08-13
    • US293979
    • 1994-08-22
    • Philip C. BasileJames E. Thompson, Jr.David KlineGary E. Toner
    • Philip C. BasileJames E. Thompson, Jr.David KlineGary E. Toner
    • H04B1/58H04B15/00
    • H04B1/586
    • A communications station (10) couples a bidirectional input-output signal path (16') to two unidirectional signal paths; a transmit signal path (12') and a receive signal path (14'), using a controllable hybrid (20). A feedback control system in the station minimizes the amount of transmit signal appearing at the receive output port (24) of the hybrid (20). The control system spreads the spectrum of a pilot signal (40) by means of a biphase modulator (46) and a pseudorandom generator (42) to produce a spread-spectrum pilot, which is added, in a summer 30, to the transmit signal. The spread-spectrum pilot signal covers the bandwidth of the information signal, and is reflected in an amount and with a phase which depends upon the relative impedance presented to the hybrid (20) by the bidirectional signal path (16'). The receive signal, which arrives at the station bidirectional port (16) from the bidirectional path, is coupled from the hybrid (20) to a spread-spectrum demodulator (56), which regenerates the own-station pilot signal with a phase which depends upon the impedance presented by the bidirectional signal path to the hybrid. The pilot signal is phase-detected (64), processed, and applied to the hybrid to degeneratively minimize the amount of transmit signal coupled to the receive port (14).
    • 通信站(10)将双向输入 - 输出信号路径(16')耦合到两个单向信号路径; 发射信号路径(12')和接收信号路径(14'),使用可控混合(20)。 站中的反馈控制系统使出现在混合动力(20)的接收输出端口(24)处的发射信号的量最小化。 控制系统通过双相调制器(46)和伪随机发生器(42)扩展导频信号(40)的频谱,以产生扩频导频,其在加法器30中被添加到发射信号 。 扩展频谱导频信号覆盖信息信号的带宽,并且反映在取决于通过双向信号路径(16')呈现给混合(20)的相对阻抗的量和相位。 从双向路径到达站双向端口(16)的接收信号从混合(20)耦合到扩频解调器(56),扩频解调器(56)以相关的相位再生本站导频信号 通过双向信号路径提供给混合信号的阻抗。 导频信号被相位检测(64),被处理并应用到混合器以使耦合到接收端口(14)的发射信号的量退化最小化。