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1. 发明授权

US09660848B2 Methods and structures to generate on/off keyed carrier signals for signal isolators 有权
公开(公告)号：US09660848B2
公开(公告)日：2017-05-23
申请号：US14486937
申请日：2014-09-15
申请人： Analog Devices Global
发明人： Ruida Yun , Yuanjie Sun , Baoxing Chen
IPC分类号： H04L27/04 , H03B5/12 , H03C1/60
CPC分类号： H04L27/04 , H03B5/1215 , H03B5/1228 , H03C1/60 , H04L25/0286
摘要： An oscillator for a signal isolator system includes a capacitor and an inductor connected in parallel, two pairs of cross-coupled switches and a control switch. The capacitor, the inductor and the cross-coupled switches form an oscillator. The control switch controls operation of the oscillator between an ON state and an OFF state in response to a data signal to be communicated across an isolation barrier. The inductor may be formed from a winding of an isolation transformer, which reduces component count as compared to a system that provides a separate inductor. Other embodiments may include a current-supplying kickstart circuit and a shorting transistor that can speed transition between the ON and OFF states.

2. 发明申请

US20160080181A1 METHODS AND STRUCTURES TO GENERATE ON/OFF KEYED CARRIER SIGNALS FOR SIGNAL ISOLATORS 有权
标题翻译：用于生成用于信号隔离器的关键载波信号的开/关的方法和结构
公开(公告)号：US20160080181A1
公开(公告)日：2016-03-17
申请号：US14486937
申请日：2014-09-15
申请人： Ruida Yun , Yuanjie Sun , Baoxing Chen
发明人： Ruida Yun , Yuanjie Sun , Baoxing Chen
IPC分类号： H04L27/04
CPC分类号： H04L27/04 , H03B5/1215 , H03B5/1228 , H03C1/60 , H04L25/0286
摘要： An oscillator for a signal isolator system includes a capacitor and an inductor connected in parallel, two pairs of cross-coupled switches and a control switch. The capacitor, the inductor and the cross-coupled switches form an oscillator. The control switch controls operation of the oscillator between an ON state and an OFF state in response to a data signal to be communicated across an isolation barrier. The inductor may be formed from a winding of an isolation transformer, which reduces component count as compared to a system that provides a separate inductor. Other embodiments may include a current-supplying kickstart circuit and a shorting transistor that can speed transition between the ON and OFF states.
摘要翻译：用于信号隔离器系统的振荡器包括并联连接的电容器和电感器，两对交叉耦合开关和控制开关。电容器，电感器和交叉耦合开关形成振荡器。控制开关响应于跨隔离屏障传送的数据信号，控制振荡器在ON状态和OFF状态之间的操作。电感器可以由隔离变压器的绕组形成，与提供单独电感器的系统相比，该绕组减少了元件数量。其他实施例可以包括可以加速导通和截止状态之间的转换的电流供应启动电路和短路晶体管。

3. 发明授权

US08508309B2 Wideband phase modulation methods and apparatus 有权
公开(公告)号：US08508309B2
公开(公告)日：2013-08-13
申请号：US13231874
申请日：2011-09-13
申请人： Earl W. McCune, Jr.
发明人： Earl W. McCune, Jr.
IPC分类号： H03K5/15
CPC分类号： H04L27/20 , H03C1/20 , H03C1/60 , H03C3/02 , H03C5/00
摘要： A wideband phase modulator comprises a multiphase generator, a phase selector, and a phase adjuster. The wideband phase modulator is configured to receive an N-bit digital phase-modulating signal comprising a timed sequence of N-bit phase-modulating words, where N is a positive integer representing the bit resolution of the N-bit digital phase-modulating signal. The multiphase generator generates a plurality of coarse carrier phases, all having the same carrier frequency but each offset in phase relative to the other. The M most significant bits of the N-bit phase-modulating words are used to form M-bit phase select words that control the output phase of the phase selector. The phase adjuster performs a precision rotation operation, whereby a selected coarse carrier phase is adjusted so that the phase of the resulting final precision phase-modulated signal more closely aligns with a desired precision phase.

4. 发明授权

US07170950B2 DRM/AM simulcast 有权
标题翻译： DRM / AM联播
公开(公告)号：US07170950B2
公开(公告)日：2007-01-30
申请号：US10191190
申请日：2002-07-09
申请人： Jens Wildhagen , Dietmar Schill
发明人： Jens Wildhagen , Dietmar Schill
IPC分类号： H03C1/52
CPC分类号： H04H60/07 , H03C1/60 , H04H20/36 , H04H2201/12 , H04H2201/20
摘要： An AM simulcast broadcast signal combining a digital transmission signal and an analogue transmission signal in one transmission channel. The digital transmission signal is modulated to one sideband of a carrier of the transmission channel and a correcting signal (C) is modulated to the other sideband of the carrier of the transmission channel, which correcting signal (C) is determined so that the envelope demodulation of the transmission channel represents the analogue transmission signal.
摘要翻译：在一个传输信道中组合数字传输信号和模拟传输信号的AM同播广播信号。数字传输信号被调制到传输信道的载波的一个边带，并且校正信号（C）被调制到传输信道的载波的另一个边带，该校正信号（C）被确定为使得包络解调的传输信道表示模拟传输信号。

5. 发明授权

US06249559B1 Digital frequency phase locked loop (FPLL) for vestigial sideband (VSB) modulation transmission system 失效
标题翻译：数字频率锁相环（FPLL），用于残留边带（VSB）调制传输系统
公开(公告)号：US06249559B1
公开(公告)日：2001-06-19
申请号：US08702094
申请日：1996-08-23
申请人： Jung-Sig Jun
发明人： Jung-Sig Jun
IPC分类号： H03D324
CPC分类号： H03C1/60 , H04L27/02 , H04L2027/0028 , H04L2027/0055 , H04N5/21 , H04N5/4401
摘要： In a digital frequency phase locked loop (FPLL) for a grand alliance (GA) HDTV receiver using a vestigial sideband (VSB) modulation transmission system, the digital FPLL for a VSB transmission system having a VCO and a plurality of NTSC carrier eliminating filters for eliminating interference of NTSC adjacent channels includes a filter for eliminating high-frequency components by converting a digital signal output from one of the plurality of NTSC carrier eliminating filters, a delay for delaying the high-frequency-component-eliminated signal by a predetermined width so that its frequency-versus-phase characteristics are changed linearly, symbol inverter for inverting the symbol of the digital signal output from another of the plurality of NTSC-carrier eliminating filters, a switch for selectively outputting the symbol-inverted signal and the digital signal output from another filter, a second filter for limiting the selectively output signal to a predetermined frequency band, a digital-to-analog (D/A) converter for converting the band-limited-digital signal into an analog signal. The result is that the frequency-versus-phase characteristics of the filter is linear, and the size of digital ASICs gates are remarkably reduced.
摘要翻译：在使用残留边带（VSB）调制传输系统的用于大联盟（GA）HDTV接收机的数字频率锁相环（FPLL）中，具有VCO的VSB传输系统的数字FPLL和多个NTSC载波消除滤波器消除NTSC相邻信道的干扰包括用于通过转换从多个NTSC载波消除滤波器之一输出的数字信号来消除高频分量的滤波器，用于将高频分量消除信号延迟预定宽度的延迟，从而其频率相位特性线性地改变，用于反转从多个NTSC载波去除滤波器中的另一个输出的数字信号的符号的符号反相器，用于选择性地输出符号反相信号和数字信号输出的开关来自另一个滤波器，用于将选择性地输出信号限制到预定频带的第二滤波器，数字用于将带限数字信号转换为模拟信号的I / D模拟（D / A）转换器。结果是滤波器的频率 - 相位特性是线性的，并且数字ASIC门的尺寸显着降低。

6. 发明授权

US5644260A RC/CR automatic quadrature network 失效
标题翻译： RC / CR自动正交网络
公开(公告)号：US5644260A
公开(公告)日：1997-07-01
申请号：US542745
申请日：1995-10-13
申请人： Marcus K. DaSilva , Andrew M. Teetzel
发明人： Marcus K. DaSilva , Andrew M. Teetzel
IPC分类号： H03H7/20 , H03C1/02 , H03C1/52 , H03C1/60 , H03C3/00 , H03C3/40 , H03C5/00 , H03D1/22 , H03D3/00 , H03H7/21 , H03H11/16 , H03H11/18 , H03H11/22 , H04L27/20 , H04L27/36
CPC分类号： H03C5/00 , H03C1/52 , H03C3/00 , H03C3/40 , H03H11/16 , H03H11/18 , H03H11/22 , H03C1/02 , H03C1/60 , H03C2200/0016 , H03C2200/0058 , H03D1/2245 , H03D3/007
摘要： An IQ modulator incorporates a quadrature network that is responsive to a frequency dependent control signal and that has in-phase and quadrature signals that are of equal amplitude and in exact quadrature over a wide range of applied frequencies. The quadrature network includes RC and CR phase shifters whose C's are fixed capacitors of equal value and whose R's are made equal to each other and to the capacitive reactance of the C's by the action of the frequency dependent control signal. The R's may be FET's. The frequency dependent control signal may be generated without express knowledge of the applied frequency by a servo loop that nulls out the amplitude difference between the in-phase and quadrature outputs from the quadrature network; it may also be generated from a look-up table as an express function of frequency. The frequency dependent control signal is split into separate instances that are applied to each R, and an offset may be introduced therebetween to provide extreme precision. The offset may be fixed or programmatically controlled as a function of frequency. Varactors may be used to provide variable C's in cooperation with fixed R's. The entire circuit may be fabricated as a GaAs IC for use in the frequency range of 200 MHz to 3 GHz.
摘要翻译： IQ调制器包括正交网络，该正交网络响应于频率相关的控制信号，并且具有同相和正交信号，它们在宽的施加频率范围内具有相等幅度和准确的正交。正交网络包括RC和CR相移器，其C是相等值的固定电容器，并且R通过频率相关控制信号的作用使得R相互相等并且与C的容性电抗相对应。 R的可能是FET的。频率相关控制信号可以在没有通过伺服环路的应用频率的明确知识的情况下产生，从而消除来自正交网络的同相和正交输出之间的幅度差异; 它也可以从查找表生成为频率的表达功能。频率相关控制信号被分割成分别应用于每个R的实例，并且可以在其间引入偏移以提供极高的精度。偏移可以是固定的或者作为频率的函数被编程地控制。 Varactors可以用于与固定R协作提供变量C。整个电路可以被制造为在200MHz至3GHz的频率范围内使用的GaAs IC。

7. 发明授权

US5446423A Digital single sideband modulator and method 失效
标题翻译：数字单边带调制器和方法
公开(公告)号：US5446423A
公开(公告)日：1995-08-29
申请号：US308788
申请日：1994-09-19
申请人： Richard A. Bienz , Lansing M. Carson , Marty K. Siemon
发明人： Richard A. Bienz , Lansing M. Carson , Marty K. Siemon
IPC分类号： H03C1/60 , H04L27/04
CPC分类号： H03C1/60
摘要： A digital single sideband modulator (10) includes a relatively complex CMOS NCO (14) that drives a relatively simple ECL frequency translator (30). The frequency translator (30) outputs a digital signal that is converted to analog by a D/A (44) and then filtered in a bandpass filter (46) having a pass band including a frequency of twice the NCO's clock frequency. The NCO (14) generates a modulated intermediate frequency NCO signal having quadrature components. The frequency translator (30) multiplies real and imaginary components of the NCO signal by real and imaginary components of digitized SIN, COS sampling functions (48, 50). The resulting products are added together. The adding operation is performed by a multiplexer (32), whose selection input is driven at twice the carrier frequency, and the multiplying operations are performed by a selective negation circuit (34), that is driven at the carrier frequency.
摘要翻译：数字单边带调制器（10）包括驱动相对简单的ECL频率转换器（30）的相对复杂的CMOS NCO（14）。频率转换器（30）输出通过D / A（44）转换为模拟数字信号的数字信号，然后在具有包括NCO时钟频率的两倍频率的通带的带通滤波器（46）中进行滤波。 NCO（14）产生具有正交分量的调制中频NCO信号。频率变换器（30）通过数字化SIN，COS采样函数（48,50）的实部和虚分量将NCO信号的实分量和虚分量相乘。所得产品加在一起。加法运算由多路复用器（32）执行，多路复用器（32）的选择输入以载波频率的两倍驱动，乘法运算由选择性否定电路（34）执行，该选择性否定电路以载波频率驱动。

8. 发明授权

US5291201A Microwave integrated circuit frequency translating apparatus 失效
标题翻译：微波集成电路频率转换装置
公开(公告)号：US5291201A
公开(公告)日：1994-03-01
申请号：US21203
申请日：1993-02-23
申请人： Harvey Endler , Farid Mesghali
发明人： Harvey Endler , Farid Mesghali
IPC分类号： G01S7/38 , H03B28/00 , H03C1/60 , H03D7/14 , H03D7/16 , H03D9/06
CPC分类号： G01S7/38 , H03D9/0641 , H03B28/00 , H03C1/60 , H03D7/1408 , H03D7/165
摘要： A microwave integrated circuit for frequency translation includes a pair of mixers for receiving the input RF signal, mixing it with a pair of quadrature frequency modulation signals and by combining the output of the mixers in a quadrature coupler, suppressing all signals except for the input RF signal plus the modulation frequency. This is accomplished in an environment of high "g" forces, significant temperature variations and a need for high reliability and fast operation by a miniaturized microwave integrated circuit having microstrips on the top and bottom sides of a ceramic substrate. The mixers consist of quad diode chips which are compression welded to one side of the microstrip for good resistance to high "g" forces. Suitable balancing is provided by use of a ground plane on the opposite side with tapering. A quadrature coupler to suppress the lower sideband is in the form of a LANGE coupler which is effectively integrated on the top side of the substrate.
摘要翻译：用于频率转换的微波集成电路包括一对用于接收输入RF信号的混频器，将其与一对正交调频信号混合，并通过组合正交耦合器中的混频器的输出，抑制除输入RF之外的所有信号信号加调制频率。这是通过在陶瓷基板的顶面和底面上具有微带的微型微波集成电路的高“g”力，显着的温度变化以及需要高可靠性和快速操作的环境中实现的。混频器由四极二极管芯片组成，压电焊接在微带的一侧，以抵抗高“g”的力。通过使用相对侧的接地平面来进行适当的平衡，并具有渐缩。用于抑制下边带的正交耦合器是LANGE耦合器的形式，其被有效地集成在基板的顶侧上。

9. 发明授权

US5162763A Single sideband modulator for translating baseband signals to radio frequency in single stage 失效
标题翻译：用于将基带信号转换为单级射频的单边带调制器
公开(公告)号：US5162763A
公开(公告)日：1992-11-10
申请号：US793517
申请日：1991-11-18
申请人： Keith D. Morris
发明人： Keith D. Morris
IPC分类号： H03C1/60
CPC分类号： H03C1/60
摘要： A single sideband modulator provides a means of translating low frequency baseband signals directly to radio frequency in a single stage. Such modulators, providing suppressed carrier and one or two of the sidebands, facilitates the transmission of intelligence with significantly increased gain over AM transmission. Control signals are continuously generated to keep the local oscillator breakthrough and image sidebands down to an insignificantly low level. This is achieved by monitoring amplitude of the RF output of the single sideband modulator, and comparing this with the baseband signals. By adjusting the d.c. offsets at the baseband inputs to the balanced modulators, carrier breakthrough is cancelled. By adjusting the relative phases of the baseband signals, deviations from the 90.degree. split are compensated. By changing the amplitude of one of the baseband signals, the level of one of the RF paths is adjusted to achieve amplitude balance.
摘要翻译：单个边带调制器提供了在单个阶段将低频基带信号直接转换到射频的装置。提供抑制载波和一个或两个边带的这种调制器有助于智能化的传输，而AM传输具有显着增加的增益。连续产生控制信号以保持本地振荡器的突破，并使图像边带降低到一个微不足道的水平。这是通过监视单个边带调制器的RF输出的幅度并将其与基带信号进行比较来实现的。通过调整直流基带输入到平衡调制器的偏移，载波突破被取消。通过调整基带信号的相对相位，可以补偿90°分频的偏差。通过改变其中一个基带信号的幅度，调整一个RF路径的电平以实现幅度平衡。

10. 发明授权

US5047705A Digital amplitude modulation apparatus 失效
标题翻译：数字振幅调制装置
公开(公告)号：US5047705A
公开(公告)日：1991-09-10
申请号：US533852
申请日：1990-06-06
申请人： Takahiko Kishi
发明人： Takahiko Kishi
IPC分类号： H03C1/00 , H03C1/60
CPC分类号： H03C1/00 , H03C1/60
摘要： A digital amplitude modulation apparatus for amplitude-modulating a digital carrier having a frequency fc by a digital modulating wave associated with a sampling frequency fs1, at a sampling frequency fs2, wherein the conditions m.times.fs1=fs2, and fc=n/4.times. fs2 are satisfied, where m is a positive integer (2, 4, 6, . . . ) and n is a positive integer (1, 3, 5, . . . ). A fold distortion relative to an original digital amplitude modulated wave is not generated even if a fold component elimination filter is not used.
摘要翻译：一种数字幅度调制装置，用于以采样频率fs2与采样频率fs1相关联的数字调制波对具有频率fc的数字载波进行幅度调制，其中满足条件mxfs1 = fs2和fc = n / 4x fs2 ，其中m是正整数（2,4,6，...），n是正整数（1,3,5，...）。即使不使用折叠分量消除滤波器，也不会产生相对于原始数字幅度调制波的折叠失真。

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