公开(公告)号：US5610943A

公开(公告)日：1997-03-11

申请号：US436928

申请日：1995-05-08

Applicant: Mitsuo Kakuishi ,  Tsuyoshi Ueshima

Inventor： Mitsuo Kakuishi ,  Tsuyoshi Ueshima

IPC: H03M1/12 ,  H03M1/20 ,  H04B14/02 ,  H03H17/02

CPC classification number: H03M1/20 ,  H03M1/1235

Abstract: The present invention provides a two-system A/D converter, which provides a digital output signal with a higher conversion precision than is achieved by a single-system A/D converter. Conversely, by using a two-system D/A converter with a lower conversion precision, the present invention provides an analog output signal with a higher conversion precision than is achieved by a single-system D/A converter. Further, a digital signal clock changing unit produces data by performing high sampling of the first digital data trains, and the second digital data is synchronized with a second clock through an interpolation processing based on the timing difference between the first and second clocks. A high-precision A/D and D/A converter apparatus is thus realized by using two pulse code modulation coder/decoders (PCM.CODECs) and one digital signal processor (DSP).

Abstract translation: 本发明提供了一种双系统A / D转换器，其提供比由单系统A / D转换器实现的更高的转换精度的数字输出信号。 相反，通过使用具有较低转换精度的双系数D / A转换器，本发明提供了一种比由单系统D / A转换器实现的转换精度更高的模拟输出信号。 此外，数字信号时钟改变单元通过执行第一数字数据列的高采样产生数据，并且通过基于第一和第二时钟之间的定时差的内插处理将第二数字数据与第二时钟同步。 因此，通过使用两个脉冲编码调制编码器/解码器（PCM.CODEC）和一个数字信号处理器（DSP）来实现高精度A / D和D / A转换器装置。

公开(公告)号：US5047769A

公开(公告)日：1991-09-10

申请号：US518596

申请日：1990-05-03

Applicant: William E. Engeler ,  Matthew O'Donnell ,  John J. Bloomer ,  John T. Pedicone

Inventor： William E. Engeler ,  Matthew O'Donnell ,  John J. Bloomer ,  John T. Pedicone

IPC: H03M1/10 ,  H03M1/12

CPC classification number: H03M1/1042 ,  H03M1/1235

Abstract: A method for correcting data conversion/transfer errors in each of a plurality N of channels of a vibratory energy imaging system, by: providing an addressable memory having a plurality L=2.sup.M locations, each for storage of a data word of B bits; then storing in each of the L locations of the memory means a B-bit data word having a value selected to cause the output-to-input transfer function for that channel to assume a desired relationship, with respect to a standard transfer measure; and selecting that one of the L data word locations, responsive to that actual one of an M-bit data word output from a channel ADC or from a data bus, responsive to a test signal, in which to place corresponding data.

Abstract translation: 一种用于通过以下方式来校正振动能量成像系统的多个N个通道中的每一个中的数据转换/传送错误的方法：提供具有多个L = 2M个位置的可寻址存储器，每个用于存储B位数据字; 然后在存储器装置的每个L位置存储一个B位数据字，该B位数据字被选择为使得该通道的输出到输入传递函数相对于标准传送测量呈现期望的关系; 以及响应于来自信道ADC或从数据总线输出的M位数据字中的实际的一个，响应于在其中放置相应数据的测试信号，选择L个数据字位置中的一个。

公开(公告)号：US4939518A

公开(公告)日：1990-07-03

申请号：US248374

申请日：1988-09-23

Applicant: Masao Hotta ,  Toshihiko Shimizu ,  Kenzi Maio ,  Yoshito Nejime

Inventor： Masao Hotta ,  Toshihiko Shimizu ,  Kenzi Maio ,  Yoshito Nejime

IPC: H03M1/12 ,  H03M1/20 ,  H03M1/36

CPC classification number: H03M1/206 ,  H03M1/1235 ,  H03M1/365

Abstract: In a cyclic averaging analog to digital converter, reference voltages having a plurality of levels, each of which is inputted to one of a plurality of comparators in a flash type analog to digital converter, are shifted cyclically by a small voltage, and the outputs of the flash type analog to digital converter are added for every shift cycle in order to obtain an output digital signal. The outputs of a voltage dividing circuit provide the reference voltages with N levels, the levels differing cyclically by a small voltage. The N reference voltages are divided into groups, each of which consists of M elements N/M, switches are provided each of which selects one of the reference voltages one after another for an associated group N/M reference voltages are thus selected by these switches and are supplied to the comparators.

Abstract translation: 在循环平均模数转换器中，具有多个电平的参考电压，每个电平被输入到闪存类型模数转换器中的多个比较器中的一个，周期性地被小电压移位，并且输出 为每个移位周期添加闪存型模数转换器，以获得输出数字信号。 分压电路的输出为N个电平提供参考电压，该电平周期性地受到小电压的限制。 N个参考电压被分成组，每个组由M个元件N / M组成，提供开关，每个选择一个参考电压一个接一个地为相关联的组N / M参考电压由这些开关选择 并提供给比较器。

公开(公告)号：US4875045A

公开(公告)日：1989-10-17

申请号：US165851

申请日：1988-03-09

Applicant: David L. Lynch ,  Guy C. Quesnel

Inventor： David L. Lynch ,  Guy C. Quesnel

IPC: H03M1/18 ,  H03M1/00 ,  H03M1/10

CPC classification number: H03M1/129 ,  H03M1/1235

Abstract: A variable gain analog to digital compression encoder apparatus and method is operational for `on the fly` gain adjustments without introducing significant distortion or noise in telephone conversation. An incoming analog signal is fixed gain reproduced as a first stabilized mid-operating point analog signal. A second stabilized mid-operating point analog signal is produced in inverse proportion to the first stabilized mid-operating point analog signal, in response to a signal tapped along a signal division of a difference between the first and second signals. The second signal is compression encoded at a predetermined rate to produce pulse code modulated signal samples. The tap may be varied to change the encoding gain, at any time, in accordance with operating requirements of a telephone apparatus.

公开(公告)号：US4611194A

公开(公告)日：1986-09-09

申请号：US766371

申请日：1985-08-16

Applicant: Charles E. Konig ,  William J. Skudera, Jr.

Inventor： Charles E. Konig ,  William J. Skudera, Jr.

IPC: H03M1/12

CPC classification number: H03M1/1235 ,  H03K5/1532

Abstract: An apparatus is disclosed which permits a high speed waveform, for examplen the form of a series of analog data pulses, to be sampled and converted into a series of digital values. Each analog data pulse is applied in parallel to a multiplicity of A/D converters and to one or more level detectors. Each level detector provides a strobe when the voltage of the analog data pulse crosses a reference threshold. The strobes are applied to delay means whose outputs are a multiplicity of delayed strobe pulses which have been delayed by predetermined amounts. Each of the multiplicity of delayed strobes is applied, along with the analog data pulse, to one of the multiplicity of A/D converters. Each of the multiplicity of A/D converters samples the analog data pulse in response to the particular delayed strobe applied thereto and provides a digital value of that sample. The largest of the digital values from each of the A/D converters is provided as the output of the apparatus for each analog data pulse.

Abstract translation: 公开了一种允许例如以一系列模拟数据脉冲的形式的高速波形被采样并转换成一系列数字值的装置。 每个模拟数据脉冲并行施加到多个A / D转换器和一个或多个电平检测器。 当模拟数据脉冲的电压超过参考阈值时，每个电平检测器提供选通。 选通被应用于延迟装置，其延时选择脉冲的数量已被延迟预定量。 多个延迟选通中的每一个与模拟数据脉冲一起被应用于多个A / D转换器之一。 多个A / D转换器中的每个转换器响应于施加到其上的特定延迟选通器对模拟数据脉冲进行采样，并提供该样本的数字值。 来自每个A / D转换器的最大数字值被提供作为用于每个模拟数据脉冲的装置的输出。

公开(公告)号：US20180351570A1

公开(公告)日：2018-12-06

申请号：US15773537

申请日：2016-10-27

Applicant: ams Sensors Belgium BVBA

Inventor： Adi XHAKONI ,  Tim BLANCHAERT ,  Guy MEYNANTS

IPC: H03M1/56 ,  H03M1/12 ,  H04N5/357 ,  H04N5/378 ,  H04N5/355

CPC classification number: H03M1/56 ,  H03M1/1235 ,  H03M1/1245 ,  H03M1/183 ,  H04N5/355 ,  H04N5/3575 ,  H04N5/365 ,  H04N5/378

Abstract: An analog-to-digital converter (110) comprises an analog signal input (122) for receiving an analog signal and an amplifying stage (160) configured to generate a set of N amplified analog signals, where N is an integer≥2. The set of N signals have different gains. The ADC has a ramp signal input (121) for receiving a ramp signal and a clock input (143) for receiving at least one clock signal. A comparison stage (120) is connected to the set of amplified analog signals (SigG1, SigG2) and to the ramp signal input (121). The comparison stage (120) is configured to compare the amplified analog signals with the ramp signal to provide comparison outputs during a conversion period. A control stage is configured to control the counter stage (140) based on the comparison outputs and a selection input indicative of when at least one handover point has been reached during the conversion period.

公开(公告)号：US20160036456A1

公开(公告)日：2016-02-04

申请号：US14446107

申请日：2014-07-29

Applicant: The Boeing Company

Inventor： Amir Leon Liaghati

IPC: H03M1/12

CPC classification number: H03M1/12 ,  H03M1/121 ,  H03M1/1235 ,  H03M1/188

Abstract: A method and apparatus for converting an analog input into a final digital output. A first digital output is generated in response to receiving an analog input at a first converter. A second digital output is generated in response to receiving the analog input at a second converter. The first digital output is output to form the final digital output when an amplitude of the analog input is within a first portion of an overall range of amplitudes for the analog input and the second digital output is output to form the final digital output when the amplitude is within a second portion of the overall range of amplitudes.

Abstract translation: 一种用于将模拟输入转换成最终数字输出的方法和装置。 响应于在第一转换器处接收模拟输入而产生第一数字输出。 响应于在第二转换器处接收模拟输入而产生第二数字输出。 当模拟输入的幅度在模拟输入的幅度的整个范围的第一部分内时，第一数字输出被输出以形成最终的数字输出，并且当幅度的幅度输出时，第二数字输出被输出以形成最终的数字输出 在整个幅度范围的第二部分内。

公开(公告)号：US09019139B2

公开(公告)日：2015-04-28

申请号：US13752691

申请日：2013-01-29

Applicant: Barmak Mansoorian ,  Steven Huang ,  Rami Tantawy

Inventor： Barmak Mansoorian ,  Steven Huang ,  Rami Tantawy

IPC: H03M1/12 ,  H03M1/46

CPC classification number: H03M1/1235 ,  H03M1/464

Abstract: An A/D converter system that has a ranging detector that receives and characterizes an input signal. The characterizing sets a coarse range selection based on a level of the input signal. A higher level input signal has a higher level ranging. An A/D converter includes a compression system that compresses based on the ranging output signal by converting different numbers of bits for different level ranging output signal. A higher level input signal is more higher compressed and produces a digital output indicative of the input signal, which is compressed by different amounts based on the ranging output signal. By scaling in this way, the resolution of the A/D converter is scaled on the basis of shot noise level of the image sensor.

Abstract translation: 具有接收和表征输入信号的测距探测器的A / D转换器系统。 表征基于输入信号的电平设置粗略范围选择。 较高电平的输入信号具有较高的电平范围。 A / D转换器包括压缩系统，该压缩系统通过转换用于不同电平测距输出信号的不同比特数来基于测距输出信号进行压缩。 较高电平的输入信号被更高压缩并产生指示输入信号的数字输出，该数字输出基于测距输出信号被不同的量压缩。 通过这种缩放，A / D转换器的分辨率基于图像传感器的拍摄噪声电平进行缩放。

公开(公告)号：US20130058657A1

公开(公告)日：2013-03-07

申请号：US13597487

申请日：2012-08-29

Applicant: Frank Bucholtz ,  Jonathan M. Nichols

Inventor： Frank Bucholtz ,  Jonathan M. Nichols

IPC: H04B10/00

CPC classification number: H04B10/00 ,  H03M1/1235 ,  H03M1/1265

Abstract: A photonic compressive sampling system includes a photonic link with at least one electro-optic modulator that modulates a continuous wave optical energy with both an electrical analog signal and a pseudorandom bit sequence signal. A photodetector receives the modulated optical energy from the electro-optic modulator, and an electrical digitizer digitizes the output from the photodetector. The system enables signal recovery beyond the Nyquist limit of the digitizer. The signal being recovered has a sparse (low-dimensional) representation and the digitized samples are incoherent with this representation. An all-photonic system can faithfully recover a 1 GHz harmonic signal even when digitizing at 500 MS/s, well below the Nyquist rate.

Abstract translation: 光子压缩采样系统包括具有至少一个电光调制器的光子链路，其利用电模拟信号和伪随机比特序列信号来调制连续波光能。 光电检测器从电光调制器接收调制的光能，并且电数字转换器将来自光电检测器的输出数字化。 该系统使信号恢复超过数字转换器的奈奎斯特极限。 正在恢复的信号具有稀疏（低维）表示，并且数字化样本与该表示不相干。 全光子系统即使在以500 MS / s数字化，远低于奈奎斯特速率的情况下，也能忠实地恢复1 GHz谐波信号。

公开(公告)号：US20120250781A1

公开(公告)日：2012-10-04

申请号：US13077132

申请日：2011-03-31

Applicant: Jason H. Rud ,  Andrew J. Bronczyk

Inventor： Jason H. Rud ,  Andrew J. Bronczyk

IPC: H04L27/00

CPC classification number: H03M1/20 ,  H03M1/1235 ,  H03M1/181

Abstract: A process variable transmitter is used to measure a process variable, and, in doing so, dynamically changes the resolution of the A/D converter based upon the measured value of the analog input signal. This can be done by automatically adjusting the configurable resolution gain adjustment based on the value of the analog signal being measured, by normalizing the input signal being measured so that it is centered in an optimal resolution window of the A/D converter, or by adjusting a voltage reference provided to the A/D converter.

Abstract translation: 过程变量发送器用于测量过程变量，并且在这样做时，基于模拟输入信号的测量值来动态地改变A / D转换器的分辨率。 这可以通过基于所测量的模拟信号的值自动调整可配置的分辨率增益调整，通过对所测量的输入信号进行归一化，使其在A / D转换器的最佳分辨率窗口中居中，或者通过调整 提供给A / D转换器的电压参​​考。