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41.发明授权
公开(公告)号：US3560860A
公开(公告)日：1971-02-02
申请号：US3560860D
申请日：1969-02-20
发明人： GUELDENPFENNIG KLAUS
CPC分类号： H04L7/06
摘要： A CIRCUIT FOR GENERATING A SPECIAL SIGNAL FOR SYNCHRONIZING THE RECEIVERS OF A MASTER-REMOTE SYSTEM OF THE KIND USED FOR THE SUPERVISION AND CONTROL OF APPARATUS FROM A REMOTE LOCATION, AND IN WHICH THE INFORMATION SIGNALS USED FOR SUPERVISION AND CONTROL CONSIST OF TRAINS OF ELECTRICAL PULSES, ALL THE PULSES OF EACH TRAIN BEING OF THE SAME LENGTH. TWO SPECIAL PULSES ARE TRANSMITTED FOR SYNCHRONIZATION JUST PRIOR TO THE START OF EACH TRAIN OF INFORMATION PULSES. THE SPECIAL PULSES ARE OF PREDETERMINED POLARITY, AND ARE EACH ONE AND ONE-HALF TIMES AS LONG AS THE INFORMATION PULSES. THE CIRCUIT USES A COUNTER AND A SERIES OF FLIP-FLOPS AND GATES TO PRODUCE THE DESIRED SYNCHRONIZING SIGNALS, AND ALSO TO DEFINE THE PROPER DURATIONS OF THE INFORMATION PULSES. IN ADDITION, A GATE ARRANGEMENT IS USED TO PRODUCE A SPECIAL START DATA PULSE AT A PREDETERMINED TIME AFTER THE SYNCHRONIZING PULSES ARE COMPLETED.
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公开(公告)号：US3553592A
公开(公告)日：1971-01-05
申请号：US3553592D
申请日：1967-11-08
发明人： AHRWEILLER MICHEL
CPC分类号： H03K3/37
摘要： A RECTANGULAR PULSE GENERATOR HAVING A DIRECT CURRENT SOURCE, A LOAD MOUNTED IN SERIES WITH A FIRST GAS-FILLED OR SEMI-CONDUCTING THYRATRON AND CONNECTED ACROSS THE SOURCE, A REBLOCKING CIRCUIT FOR THE FIRST THYRATRON CONNECTED IN PARALLEL WITH THE FIRST THYRATRON AND THE LOAD,
AND A SECOND THYRATRON CONNECTED IN SERIES WITH A TRANSIENT RESPONSE ELEMENT CONNECTED IN THE REBLOCKING CIRCUIT OF THE FIRST THYRATRON.-
公开(公告)号：US3500074A
公开(公告)日：1970-03-10
申请号：US3500074D
申请日：1966-08-15
发明人： OBENHAUS ROBERT E
CPC分类号： G05D23/24 , H02H5/042 , Y10T307/773
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44.发明授权
公开(公告)号：US3492593A
公开(公告)日：1970-01-27
申请号：US3492593D
申请日：1964-04-20
发明人： ULLMANN WERNER , DONATI FRANCO
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公开(公告)号：US07196555B2
公开(公告)日：2007-03-27
申请号：US10957319
申请日：2004-09-30
申请人： Stewart S. Taylor
发明人： Stewart S. Taylor
IPC分类号： H03K1/00
CPC分类号： H03F3/301 , G05F3/262 , H03F1/32 , H03F3/347 , H03F3/45475 , H03F2203/45288
摘要： An apparatus includes an input port, an output port, a resistor, and a current amplifier. The current amplifier includes an input circuit and an output circuit. The resistor is coupled to the input port. The input circuit is coupled to the resistor and the output circuit. The output circuit is coupled to the output port, the input circuit and the output circuit. The input circuit and output circuit have substantially identical topologies. A method includes receiving an input voltage signal, converting the input voltage signal to a current signal, and processing the current signal to form a feedback signal and an output current signal that is a substantially linear representation of the input voltage signal.
摘要翻译： 一种装置包括输入端口，输出端口，电阻器和电流放大器。 电流放大器包括输入电路和输出电路。 电阻器耦合到输入端口。 输入电路耦合到电阻和输出电路。 输出电路耦合到输出端口，输入电路和输出电路。 输入电路和输出电路具有基本相同的拓扑结构。 一种方法包括接收输入电压信号，将输入电压信号转换为电流信号，以及处理电流信号以形成反馈信号和作为输入电压信号的基本线性表示的输出电流信号。
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47.发明授权Digital VSB detector with bandpass phase tracker using rader filters, as for use in an HDTV receiver 失效数字VSB检测器，带有使用雷达滤波器的带通相位跟踪器，用于HDTV接收机
公开(公告)号：US5548617A
公开(公告)日：1996-08-20
申请号：US243480
申请日：1994-05-19
CPC分类号： H04N5/4401 , H04L27/3836 , H04N5/455 , H04N5/50
摘要： In a radio receiver for receiving vestigial sideband (VSB) signals including symbol codes descriptive of digital signals, HDTV signals being exemplary of such VSB signals, a tuner provides for selecting one of channels at different locations in a frequency band used for transmitting such VSB signals. The tuner also includes mixers for performing plural conversion of the selected channel to a final intermediate-frequency signal, which is digitized by an analog-to-digital converter. A phase tracker, operative on narrow-bandpass filtered portions of the digitized final intermediate frequency signal centering on its carrier frequency, suppresses an imaginary portion of the final intermediate-frequency signal, arising from multipath distortion or from phase incoherency in local oscillations used during frequency conversion. A digital controlled oscillator in the phase tracker supplies digital descriptions of the carrier wave for the final intermediate-frequency signal to a synchronous detector, which synchronous detector detects the real portion of the digitized final intermediate-frequency signal in accordance with those digital descriptions of the carrier wave pair of all-pass digital filters, which exhibit a constant .pi./2 difference in phase response for the digitized bandpass signals and are designed based on Jacobian elliptic functions as described by C. M. Rader, are used in the phase tracker for generating the real and imaginary portions of the digitized final intermediate-frequency signal.
摘要翻译： 在用于接收包括描述数字信号的符号代码的残留边带（VSB）信号的无线电接收机中，HDTV信号是这样的VSB信号的示例，调谐器提供用于在用于发送这样的VSB信号的频带中的不同位置处选择一个信道 。 调谐器还包括用于执行所选频道的多个转换到由模数转换器数字化的最终中频信号的混频器。 基于其载波频率的数字化最终中频信号的窄带通滤波部分的相位跟踪器抑制由多径失真引起的最终中频信号的虚部，或者在频率期间使用的局部振荡中的相位不相干性 转换。 相位跟踪器中的数字控制振荡器将最终中频信号的载波的数字描述提供给同步检波器，该同步检测器根据这些数字描述的数字化最终中频信号的实际部分 对于数字化带通信号，其相位响应表现出常数pi / 2的全波数字滤波器的载波对，并且基于由CM Rader描述的雅可比椭圆函数设计，用于相位跟踪器中以产生真实的 和数字化的最终中频信号的虚部。
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公开(公告)号：US4179663A
公开(公告)日：1979-12-18
申请号：US813178
申请日：1969-04-03
申请人： Jean-Pierre Vasseur
发明人： Jean-Pierre Vasseur
CPC分类号： H04L9/0662
摘要： In a binary system, for example, the "0" and the "1" are rendered more equi-probable in the output pseudo-random sequences of a switch controlled in a pseudo-random way by feeding to the inputs of the switch input sequences which are two and two complementary, i.e. the sum of two simultaneous digits of two such sequences is always 1.
摘要翻译： 在二进制系统中，例如，通过馈送到开关输入序列的输入，以伪随机方式控制的开关的输出伪随机序列中的“0”和“1”变得更加均等 这是两个和两个互补的，即两个这样的序列的两个同时数字的和始终为1。
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公开(公告)号：US4170768A
公开(公告)日：1979-10-09
申请号：US811637
申请日：1977-06-30
申请人： Hiroshi Kitagawa
发明人： Hiroshi Kitagawa
摘要： A key code generator for electronic musical instruments which has a group of memories respectively corresponding to blocks of key switches and temporarily storing their closed state, a block detector for detecting the memories corresponding to the blocks that even one key switch is in its closed state, a priority selector for sequentially designating the detected blocks in the order of priority, a block designating gate means for supplying clock pulses to the memories corresponding to the designated blocks to serially derive therefrom their information in accordance with the output from the priority selector, an encoder for encoding the output from the priority selector into a binary code, a counter for counting the clock pulses outputted from the block designating gate means, means for gating the count value of the counter and the binary code designating each block with the serial output read out of each memory, means for detecting a change in the binary code, and means for resetting the counter with the output from the detecting means, and in which the binary code gated with the serial output from the memory and outputted is used as key code information.
摘要翻译： 一种用于电子乐器的键码发生器，其具有分别对应于键开关的块并临时存储其闭合状态的一组存储器，用于检测与即使一个键开关处于其闭合状态的块相对应的存储器的块检测器， 优先级选择器，用于以优先级顺序指定检测到的块;块指定门装置，用于向对应于指定块的存储器提供时钟脉冲，以根据优先选择器的输出从其中串行导出其信息;编码器 用于将来自优先选择器的输出编码为二进制代码的计数器，用于对从块指定门装置输出的时钟脉冲进行计数的计数器，用于门控计数器的计数值的装置和指定每个块的二进制码，其中串行输出被读出 的每个存储器，用于检测二进制代码的变化的装置和用于复位的装置 具有来自检测装置的输出的计数器，并且其中使用从存储器输出的串行输出门控的二进制码作为键码信息。
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公开(公告)号：US4029974A
公开(公告)日：1977-06-14
申请号：US631844
申请日：1975-11-13
申请人： Adrian Paul Brokaw
发明人： Adrian Paul Brokaw
摘要： A digital-to-analog converter of the type formed with a plurality of current source transistors arranged to carry different levels of current according to a predetermined weighting pattern, e.g., a binary weighting pattern. In the converter, a plurality of identically sized current source transistors carry the different levels of current and thus operate at different current densities with different base-to-emitter voltages subject to temperature drift. Stable emitter voltages, providing accurate levels of weighted current, are developed by means of resistances between the bases of successive current source transistors and a current source for developing across the interbase resistances a voltage linearly varying with absolute temperature, corresponding to the difference between base-to-emitter voltages of the successive current source transistors.The apparatus for generating a current linearly varying with absolute temperature is formed with first and second transistors forced to carry the same current at different current densities to produce different base-to-emitter voltages, and means such as an emitter resistor responsive to the difference in the base-to-emitter voltages for developing a current, corresponding to the difference in base-to-emitter voltages, which varies linearly with temperature.
摘要翻译： 一种数模转换器，其形成有多个电流源晶体管，其被布置为根据预定加权模式（例如二进制加权模式）传送不同电平的电流。 在转换器中，多个相同大小的电流源晶体管承载不同电平的电流，因此以不同的基极 - 发射极电压经受温度漂移的不同电流密度工作。 通过连续电流源晶体管的基极之间的电阻和用于在跨基准电阻之间形成的绝缘温度线性变化的电压的电流源开发稳定的发射极电压，提供精确的加权电流水平，对应于基极 - 连续电流源晶体管的发射极间电压。
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