公开(公告)号：US08872690B1

公开(公告)日：2014-10-28

申请号：US13482266

申请日：2012-05-29

申请人： Amol Inamdar ,  Deepnarayan Gupta

发明人： Amol Inamdar ,  Deepnarayan Gupta

IPC分类号： H03M1/12

CPC分类号： H03M3/458 ,  H03M1/0854 ,  H03M1/12 ,  H03M1/1245 ,  H03M1/68 ,  H03M3/02 ,  H03M3/46

摘要： Superconductor analog-to-digital converters (ADC) offer high sensitivity and large dynamic range. One approach to increasing the dynamic range further is with a subranging architecture, whereby the output of a coarse ADC is converted back to analog and subtracted from the input signal, and the residue signal fed to a fine ADC for generation of additional significant bits. This also requires a high-gain broadband linear amplifier, which is not generally available within superconductor technology. In a preferred embodiment, a distributed digital fluxon amplifier is presented, which also integrates the functions of integration, filtering, and flux subtraction. A subranging ADC design provides two ADCs connected with the fluxon amplifier and subtractor circuitry that would provide a dynamic range extension by about 30-35 dB.

摘要翻译： 超导体模数转换器（ADC）具有高灵敏度和大动态范围。 进一步增加动态范围的一种方法是使用子架构，由此将粗略ADC的输出转换回模拟并从输入信号中减去，并将剩余信号馈送到精细ADC以产生额外的有效位。 这也需要高增益宽带线性放大器，这在超导体技术中通常不可用。 在优选实施例中，提出了分布式数字通量放大器，其还集成了积分，滤波和磁通减法的功能。 子阵列ADC设计提供了两个与物理放大器和减法器电路连接的ADC，可提供大约30-35 dB的动态范围扩展。

公开(公告)号：US20130004180A1

公开(公告)日：2013-01-03

申请号：US13602474

申请日：2012-09-04

申请人： Deepnarayan Gupta ,  Oleg Mukhanov

发明人： Deepnarayan Gupta ,  Oleg Mukhanov

IPC分类号： H04B10/00

CPC分类号： H04B10/25752 ,  H04B10/2575 ,  H04B10/40 ,  H04B10/5561 ,  H04B10/697 ,  H04L27/2096

摘要： A transceiver architecture for wireless base stations wherein a broadband radio frequency signal is carried between at least one tower-mounted unit and a ground-based unit via optical fibers, or other non-distortive media, in either digital or analog format. Each tower-mounted unit (for both reception and transmission) has an antenna, analog amplifier and an electro-optical converter. The ground unit has ultrafast data converters and digital frequency translators, as well as signal linearizers, to compensate for nonlinear distortion in the amplifiers and optical links in both directions. In one embodiment of the invention, at least one of the digital data converters, frequency translators, and linearizers includes superconducting elements mounted on a cryocooler.

公开(公告)号：US07816940B1

公开(公告)日：2010-10-19

申请号：US12535434

申请日：2009-08-04

申请人： Deepnarayan Gupta ,  Amol Inamdar

发明人： Deepnarayan Gupta ,  Amol Inamdar

IPC分类号： H03K19/195

CPC分类号： H03K19/01 ,  H03F19/00 ,  H03K11/00 ,  H03K17/92 ,  H03K19/1954

摘要： Supercooled electronics often use Rapid Single Flux Quantum (RSFQ) digital circuits. The output voltages from RSFQ devices are too low to be directly interfaced with semiconductor electronics, even if the semiconductor electronics are cooled. Techniques for directly interfacing RSFQ digital circuits with semiconductor electronics are disclosed using a novel inverting transimpedance digital amplifier in conjunction with a non-inverting transimpedance digital amplifier to create a differential transimpedance digital amplifier that permits direct interfacing between RSFQ and semiconductor electronics.

摘要翻译： 过冷电子设备通常使用快速单通量（RSFQ）数字电路。 RSFQ器件的输出电压太低，即使半导体电子器件被冷却，也不能与半导体电子器件直接接口。 使用新颖的反相跨阻抗数字放大器结合非反相跨阻抗数字放大器公开了将RSFQ数字电路与半导体电子器件直接接口的技术，以产生允许RSFQ和半导体电子器件之间直接接口的差分跨阻抗数字放大器。

公开(公告)号：US20080290938A1

公开(公告)日：2008-11-27

申请号：US12002592

申请日：2007-12-18

申请人： Deepnarayan Gupta ,  Alan Kadin

发明人： Deepnarayan Gupta ,  Alan Kadin

IPC分类号： H03G3/00

CPC分类号： H03G3/002 ,  H03F3/2178 ,  H03F3/24 ,  H03F2200/168 ,  H03F2200/351 ,  H03F2200/451 ,  H03G1/0088

摘要： A broadband multibit digital radio-frequency (RF) signal is synthesized digitally. to convert the digital signal to a high-power analog signal for RF transmission. Each bit (or cluster of bits) of the digital signal is first separately amplified using a fast switching amplifier with a controlled dc power supply voltage. The DC voltages are weighted to match the significance of the bits, and controlled by a set of calibrated DC reference sources to maintain high precision. The amplified digital signals from the various bits are then combined and passed through an appropriate analog filter to generate the RF signal to be transmitted. Such a signal can exhibit broad bandwidth, high dynamic range, excellent linearity, and low noise. Preferred embodiments of this system can incorporate superconducting electronic elements. For ultimate precision, a set of primary or secondary DC voltage standards can be used to regulate the switching amplifier supply voltages.

摘要翻译： 数字合成宽带多位数字射频（RF）信号。 将数字信号转换为高功率​​模拟信号进行RF传输。 使用具有受控直流电源电压的快速开关放大器，首先分别放大数字信号的每个位（或位串）。 直流电压被加权以匹配位的重要性，并由一组校准的直流参考源控制以保持高精度。 然后将来自各种位的放大的数字信号组合并通过适当的模拟滤波器以产生要发送的RF信号。 这样的信号可以呈现宽带宽，高动态范围，优异的线性度和低噪声。 该系统的优选实施例可以包含超导电子元件。 为了最终的精度，可以使用一组初级或次级直流电压标准来调节开关放大器电源电压。

公开(公告)号：US07362125B2

公开(公告)日：2008-04-22

申请号：US11424121

申请日：2006-06-14

申请人： Deepnarayan Gupta ,  Alexander F. Kirichenko

发明人： Deepnarayan Gupta ,  Alexander F. Kirichenko

IPC分类号： H03K19/195

CPC分类号： H04B1/44 ,  H03K17/92 ,  H04B1/005 ,  H04B1/0483 ,  H04B1/40

摘要： Routing and distribution of radio-frequency (RF) signals is commonly achieved in the analog domain. However, improved performance and simplified circuit architectures may be obtained by first digitizing the RF signal, and then carrying out all routing in the digital domain. A new generation of scalable digital switches has been developed, which routes both the data and clock signals together, this being necessary to maintain the integrity of the digitized RF signal. Given the extremely high switching speeds necessary for these applications (tens of GHz), this is implemented using Rapid-Single-Flux-Quantum (RSFQ) logic with superconducting integrated circuits. Such a digital switch matrix may be applied to either the receiver or transmitter components of an advanced multi-band, multi-channel digital transceiver system, and is compatible with routing of signals with different clock frequencies simultaneously within the same switch matrix.

摘要翻译： 射频（RF）信号的路由和分配通常在模拟域中实现。 然而，可以通过首先数字化RF信号，然后在数字域中执行所有路由来获得改进的性能和简化的电路架构。 已经开发出新一代可扩展的数字交换机，其将数据和时钟信号路由到一起，这是维持数字化RF信号的完整性所必需的。 鉴于这些应用（数十GHz）所需的极高开关速度，这使用具有超导集成电路的快速单通量量子（RSFQ）逻辑实现。 这种数字开关矩阵可以应用于高级多频带多声道数字收发器系统的接收器或发射器部件，并且可以在相同的开关矩阵内同时路由具有不同时钟频率的信号。

公开(公告)号：US20070293160A1

公开(公告)日：2007-12-20

申请号：US11424121

申请日：2006-06-14

申请人： Deepnarayan Gupta ,  Alexander F. Kirichenko

发明人： Deepnarayan Gupta ,  Alexander F. Kirichenko

IPC分类号： H04B1/44 ,  H04M1/00

CPC分类号： H04B1/44 ,  H03K17/92 ,  H04B1/005 ,  H04B1/0483 ,  H04B1/40

摘要： Routing and distribution of radio-frequency (RF) signals is commonly achieved in the analog domain. However, improved performance and simplified circuit architectures may be obtained by first digitizing the RF signal, and then carrying out all routing in the digital domain. A new generation of scalable digital switches has been developed, which routes both the data and clock signals together, this being necessary to maintain the integrity of the digitized RF signal. Given the extremely high switching speeds necessary for these applications (tens of GHz), this is implemented using Rapid-Single-Flux-Quantum (RSFQ) logic with superconducting integrated circuits. Such a digital switch matrix may be applied to either the receiver or transmitter components of an advanced multi-band, multi-channel digital transceiver system, and is compatible with routing of signals with different clock frequencies simultaneously within the same switch matrix.

摘要翻译： 射频（RF）信号的路由和分配通常在模拟域中实现。 然而，可以通过首先数字化RF信号，然后在数字域中执行所有路由来获得改进的性能和简化的电路架构。 已经开发出新一代可扩展的数字交换机，其将数据和时钟信号路由到一起，这是维持数字化RF信号的完整性所必需的。 鉴于这些应用（数十GHz）所需的极高开关速度，这使用具有超导集成电路的快速单通量量子（RSFQ）逻辑实现。 这种数字开关矩阵可以应用于高级多频带多声道数字收发器系统的接收器或发射器部件，并且可以在相同的开关矩阵内同时路由具有不同时钟频率的信号。

公开(公告)号：US08867931B2

公开(公告)日：2014-10-21

申请号：US13602474

申请日：2012-09-04

申请人： Deepnarayan Gupta ,  Oleg Mukhanov

发明人： Deepnarayan Gupta ,  Oleg Mukhanov

IPC分类号： H04B10/2575 ,  H04L27/20

CPC分类号： H04B10/25752 ,  H04B10/2575 ,  H04B10/40 ,  H04B10/5561 ,  H04B10/697 ,  H04L27/2096

摘要： A transceiver architecture for wireless base stations wherein a broadband radio frequency signal is carried between at least one tower-mounted unit and a ground-based unit via optical fibers, or other non-distortive media, in either digital or analog format. Each tower-mounted unit (for both reception and transmission) has an antenna, analog amplifier and an electro-optical converter. The ground unit has ultrafast data converters and digital frequency translators, as well as signal linearizers, to compensate for nonlinear distortion in the amplifiers and optical links in both directions. In one embodiment of the invention, at least one of the digital data converters, frequency translators, and linearizers includes superconducting elements mounted on a cryocooler.

摘要翻译： 一种用于无线基站的收发机架构，其中宽带射频信号通过光纤或数字或模拟格式的光纤或其他非失真媒介在至少一个塔式安装单元和基于地面的单元之间承载。 每个塔式装置（用于接收和传输）都具有天线，模拟放大器和电光转换器。 地面单元具有超快数据转换器和数字频率转换器以及信号线性化器，以补偿放大器和光学链路在两个方向上的非线性失真。 在本发明的一个实施例中，至少一个数字数据转换器，频率转换器和线性化器包括安装在低温冷却器上的超导元件。

公开(公告)号：US20120328301A1

公开(公告)日：2012-12-27

申请号：US13602516

申请日：2012-09-04

申请人： Deepnarayan Gupta ,  Oleg Mukhanov

发明人： Deepnarayan Gupta ,  Oleg Mukhanov

IPC分类号： H04B10/18 ,  H04B15/00

CPC分类号： H04B10/25752 ,  H04B10/2575 ,  H04B10/40 ,  H04B10/5561 ,  H04B10/697 ,  H04L27/2096

摘要： A transceiver architecture for wireless base stations wherein a broadband radio frequency signal is carried between at least one tower-mounted unit and a ground-based unit via optical fibers, or other non-distortive media, in either digital or analog format. Each tower-mounted unit (for both reception and transmission) has an antenna, analog amplifier and an electro-optical converter. The ground unit has ultrafast data converters and digital frequency translators, as well as signal linearizers, to compensate for nonlinear distortion in the amplifiers and optical links in both directions. In one embodiment of the invention, at least one of the digital data converters, frequency translators, and linearizers includes superconducting elements mounted on a cryocooler.

摘要翻译： 一种用于无线基站的收发机架构，其中宽带射频信号通过光纤或数字或模拟格式的光纤或其他非失真媒介在至少一个塔式安装单元和基于地面的单元之间承载。 每个塔式装置（用于接收和传输）都具有天线，模拟放大器和电光转换器。 地面单元具有超快数据转换器和数字频率转换器以及信号线性化器，以补偿放大器和光学链路在两个方向上的非线性失真。 在本发明的一个实施例中，至少一个数字数据转换器，频率转换器和线性化器包括安装在低温冷却器上的超导元件。

公开(公告)号：US08055235B1

公开(公告)日：2011-11-08

申请号：US12434590

申请日：2009-05-01

申请人： Deepnarayan Gupta ,  Amol Inamdar

发明人： Deepnarayan Gupta ,  Amol Inamdar

IPC分类号： H04B1/10

CPC分类号： H04B1/10 ,  H04B1/525

摘要： A system and method for receiving a signal, comprising an input adapted to receive a radio frequency signal having a strong interferer; a signal generator, adapted to produce a representation of the interferer as an analog signal generated based on an oversampled digital representation thereof; and a component adapted to cancel the strong interferer from radio frequency signal based on the generated analog signal to produce a modified radio frequency signal substantially absent the interferer. The system typically has a nonlinear component that either saturates or produces distortion from the strong interferer, which is thereby reduced. The system preferably employs high speed circuits which digitize and process radio frequency signals without analog mixers.

摘要翻译： 一种用于接收信号的系统和方法，包括：适于接收具有强干扰源的射频信号的输入; 信号发生器，适于产生干扰源的表示，作为基于其过采样数字表示生成的模拟信号; 以及适于基于所生成的模拟信号从射频信号消除强干扰源以产生基本上不存在干扰源的修改的射频信号的分量。 系统通常具有非线性分量，其从强干扰源饱和或产生失真，从而减少。 该系统优选采用数字化和处理射频信号的高速电路，而不需要模拟混频器。

公开(公告)号：US07876869B1

公开(公告)日：2011-01-25

申请号：US11957393

申请日：2007-12-14

申请人： Deepnarayan Gupta

发明人： Deepnarayan Gupta

IPC分类号： H04B1/10 ,  H04B1/18

CPC分类号： H04B1/123 ,  H04B1/0028 ,  H04B1/109 ,  H04B1/38 ,  H04L27/2649

摘要： A method for reducing interference, comprising receiving a wideband signal, having at least one large amplitude component; adaptively modifying the wideband signal with respect to at least one high intensity component without substantial introduction of non-linear distortion, while reducing a residual dynamic range thereof; digitizing the modified wideband signal to capture information describing at least the high intensity signal at a sampling rate sufficient to extract modulated information present within the wideband signal at an upper limit of the band. The system analyzes a spectral characteristic of the wideband signal; and extracts adaptation parameters for the adaptive filtering. The system therefore provides both large net dynamic range and wideband operation. Preferably, the digitizer and filter, and part of the spectral characteristic analyzer is implemented in using superconducting circuit technology, with, for example low temperature superconducting digital signal processing components, and high temperature superconducting analog filtering components.

摘要翻译： 一种用于减少干扰的方法，包括接收具有至少一个大振幅分量的宽带信号; 相对于至少一个高强度分量自适应地修改宽带信号，而不会实质上引入非线性失真，同时减少其残留动态范围; 将经修改的宽带信号数字化以捕获至少描述至少高强度信号的信息，该信号的采样速率足以在频带的上限处提取存在于宽带信号内的调制信息。 该系统分析了宽带信号的频谱特性; 并提取自适应滤波的适应参数。 因此，该系统提供大的净动态范围和宽带操作。 优选地，使用超导电路技术（例如低温超导数字信号处理部件）和高温超导模拟滤波部件来实现数字转换器和滤波器以及频谱特性分析器的一部分。