公开(公告)号：US4075514A

公开(公告)日：1978-02-21

申请号：US747900

申请日：1976-12-06

Applicant: Carlo Heinrich Sequin

Inventor： Carlo Heinrich Sequin

IPC: G11C19/28 ,  G11C27/00 ,  G11C27/04 ,  H01L21/339 ,  H01L29/40 ,  H01L29/762 ,  H01L29/78 ,  H03F3/45 ,  H03H15/02 ,  H03K5/20

CPC classification number: H03F3/45479 ,  G11C19/285 ,  G11C27/00 ,  G11C27/04 ,  H01L29/40 ,  H01L29/78 ,  H03H15/02

Abstract: A sensing circuit is disclosed for detecting and amplifying the output signal of a semiconductor charge transfer device, particularly of the transversal filter type containing sensing split-electrodes for sensing the charge packets being transferred through the device. The circuit includes two amplifier means, one of which suppresses the (useless) common mode signal and the other of which detects the (useful) difference signal of the split-electrodes. In addition, the sensing circuit is provided both with "reset" switching means for eliminating spurious signals due to stray charges that accumulate on the sensing electrodes and with "clamping" switching means for eliminating noise of the kTC type generated by the "reset" switching.

公开(公告)号：US4032867A

公开(公告)日：1977-06-28

申请号：US609415

申请日：1975-09-02

Applicant: William E. Engeler ,  Richard D. Baertsch

Inventor： William E. Engeler ,  Richard D. Baertsch

IPC: H01L29/768 ,  H03H15/02 ,  H03H7/28 ,  H01L27/10 ,  H01L29/78 ,  H03K5/159

CPC classification number: H01L29/76866 ,  H03H15/02

Abstract: In a charge transfer transversal filter a semiconductor substrate is provided with main and parallel portions. A group of serially arranged electrodes insulatingly overlie and are uniformly spaced from the channel portions. The electrodes form with the substrate a plurality of stages of first and second charge transfer shift register over the main and parallel channel portions of the substrate, respectively. One electrode of each of the stages of the shift registers has a split along the length dimension thereof over the main channel portion dividing each of the one electrodes over the main channel portion into a first part and a second part with a third part overlying the parallel channel portion. The first parts of the one electrodes are connected to a first conductive line and the second and third parts of the one electrodes are connected to a second conductive line. The area of the first parts of the one electrodes being equal to the sum of the areas of the second and third parts of the one electrode.

公开(公告)号：US4027260A

公开(公告)日：1977-05-31

申请号：US648929

申请日：1976-01-14

Applicant: James Edward Carnes ,  Robert Herman Dawson ,  Robert Thomas Fedorka ,  Henry William Kaiser

Inventor： James Edward Carnes ,  Robert Herman Dawson ,  Robert Thomas Fedorka ,  Henry William Kaiser

IPC: G11C19/28 ,  G11C27/04 ,  H01L29/768 ,  H03H15/02 ,  G11C11/34 ,  G11C27/02 ,  H01L29/78 ,  H03H7/10

CPC classification number: H03H15/02 ,  G11C19/285 ,  G11C27/04 ,  H01L29/76808

Abstract: The input signal to a CCD register is sampled many times during one period of the multiple phase voltages employed to drive the CCD. The samples are translated to small charge packets which are added to one another during the one period to produce a sum charge packet which subsequently is propagated down the register. The higher frequency components, including noise, which are present in the input signal largely cancel during the charge addition process.

Abstract translation: 在用于驱动CCD的多相电压的一个周期内，对CCD寄存器的输入信号进行多次采样。 样本被转换为在一个周期期间彼此相加的小电荷分组，以产生随后从寄存器传播的和电荷分组。 存在于输入信号中的较高频率分量（包括噪声）在充电加法过程中大大抵消。

公开(公告)号：US3997973A

公开(公告)日：1976-12-21

申请号：US523591

申请日：1974-11-13

Applicant: Dennis Darcy Buss

Inventor： Dennis Darcy Buss

IPC: H01L29/423 ,  H01L29/768 ,  H03H15/02 ,  H03H7/10 ,  H01L29/78 ,  H03H7/12 ,  H03H7/28

CPC classification number: H01L29/42396 ,  H01L29/76883 ,  H03H15/02 ,  H03H2015/026

Abstract: A charge-transfer transversal filter and method of use is provided. In one aspect of the invention a handpass filter is provided where the center frequency of the bandpass is variable responsive to the clock rate applied to the charge-transfer devices. In a different aspect of the invention a matched filter for a chirp signal is provided. The filter requires a minimum number of Nyquist samples by including the provision of a clock rate which varies responsive to the frequency sweep of the input chirp signal. A method for detecting a chirp signal is provided which includes the step of selectively varying the clock rate applied to a charge-transfer shift register responsive to the frequency variations of a selected chirp signal.

Abstract translation: 提供电荷转移横向滤波器和使用方法。 在本发明的一个方面，提供了一种手持滤波器，其中带通的中心频率响应于施加到电荷转移装置的时钟速率而变化。 在本发明的另一方面，提供了一种用于线性调频信号的匹配滤波器。 滤波器通过包括提供响应于输入线性调频脉冲信号的频率扫描而变化的时钟速率，需要最小数量的奈奎斯特采样。 提供了一种用于检测线性调频信号的方法，该方法包括响应于所选啁啾信号的频率变化选择性地改变施加到电荷转移移位寄存器的时钟速率的步骤。

公开(公告)号：US3973138A

公开(公告)日：1976-08-03

申请号：US574239

申请日：1975-05-05

Applicant: Charles M. Puckette ,  Walter J. Butler

Inventor： Charles M. Puckette ,  Walter J. Butler

IPC: G11C19/18 ,  G11C27/04 ,  H03H15/02 ,  G11C19/28

CPC classification number: H03H15/02 ,  G11C19/186 ,  G11C27/04

Abstract: A charge transfer sampled data transversal filter includes a bucket-brigade delay line having a plurality of charge storage locations. Time delayed samples are derived from those locations by non-destructive sampling techniques. The magnitudes of the samples are determined by the value of the capacitors at each charge storage location.

Abstract translation: 电荷转移采样数据横向滤波器包括具有多个电荷存储位置的一个斗式行进延迟线。 通过非破坏性采样技术从这些位置导出时间延迟样本。 样品的大小由每个电荷存储位置处的电容器的值确定。

公开(公告)号：US3474260A

公开(公告)日：1969-10-21

申请号：US3474260D

申请日：1966-10-10

Applicant: SOUTH PACIFIC CO

Inventor： FROHBACH HUGH F

IPC: G06G7/625 ,  G11C27/04 ,  H03H15/02 ,  H03K5/06 ,  H04B3/23 ,  H04L25/03 ,  G11C19/00

CPC classification number: H03K5/065 ,  G06G7/625 ,  G11C27/04 ,  H03H15/02 ,  H04B3/23 ,  H04L25/03133

公开(公告)号：US2378332A

公开(公告)日：1945-06-12

申请号：US54717444

申请日：1944-07-29

Applicant: GEN RAILWAY SIGNAL CO

Inventor： SIBLEY JR HENRY C

IPC: B61L7/08 ,  G11C19/18 ,  G11C19/28 ,  G11C27/00 ,  H01L27/105 ,  H01L29/78 ,  H03H7/30 ,  H03H15/02 ,  H03M1/00

CPC classification number: B61L7/088 ,  G11C19/186 ,  G11C19/28 ,  G11C27/00 ,  H01L27/1055 ,  H01L29/78 ,  H03H7/30 ,  H03H15/02

公开(公告)号：US09847789B1

公开(公告)日：2017-12-19

申请号：US15451776

申请日：2017-03-07

Applicant: Analog Devices, Inc.

Inventor： Mikael Mortensen ,  Eric G. Nestler

IPC: H03M1/12 ,  H03M1/00 ,  H03M1/80

CPC classification number: H03M1/0626 ,  H03H15/02 ,  H03M1/00 ,  H03M1/12 ,  H03M1/804

Abstract: A sampled analog circuit is divided into at least two segments, each segment receiving sampled analog data and a respective subset of bits of a filter coefficient. The at least two segments can have digital-to-capacitance circuits with substantially identical ranges of capacitance values. One or more outputs from the segments can be scaled to reflect a position of the subset of bits in the bits of the filter coefficient, and thereafter added in the analog domain to produce a filtered output signal that may then be digitized. Alternatively, the outputs from the segments may be digitized before being scaled and/or added in the digital domain.

公开(公告)号：US09647640B2

公开(公告)日：2017-05-09

申请号：US14790448

申请日：2015-07-02

Applicant: ESS Technology, Inc.

Inventor： A. Martin Mallinson

IPC: G06F17/10 ,  H03H15/02

CPC classification number: H03H15/02

Abstract: A system and method is disclosed for placing some of the elements of a FIR filter into a high impedance state in certain situations. When it is detected that the signal to an impedance element is the same as the previous value, then the driver of that impedance element is “turned off” or goes into a high impedance state, so that no current flows through that impedance element, and it no longer contributes to the filter output. Alternatively, if the impedance elements are the same between two adjacent taps of the delay line, the driver of one of those impedance elements may be turned off or go into a high impedance state. The technique may be particularly useful in differential output filters. Turning off a driver effectively removes the attached impedance element from the filter and reduces current flow and power consumption, thus extending battery life in mobile devices.

公开(公告)号：US09287851B2

公开(公告)日：2016-03-15

申请号：US13414487

申请日：2012-03-07

Applicant: A. Martin Mallinson ,  Hu Jing Yao ,  Dustin Forman

Inventor： A. Martin Mallinson ,  Hu Jing Yao ,  Dustin Forman

IPC: G06F17/50 ,  H03H15/02

CPC classification number: G06F17/5009 ,  H03H15/02 ,  H03K5/15 ,  H03K5/1536

Abstract: A method and system for designing and implementing a finite impulse response (FIR) filter to create a plurality of output signals, each output signal having the same frequency but at a different phase shift from the other output(s), is described. Values are determined for the resistors, or other elements having impedance values, in a FIR filter having a plurality of outputs, such that each output has the same frequency response but a different phase than the other output(s). This is accomplished by the inclusion of a phase factor in the time domain calculation of the resistor values that does not change the response in the frequency domain. The phase shift is constant and independent of the frequency of the output signal.

Abstract translation: 描述了一种用于设计和实现有限脉冲响应（FIR）滤波器以产生多个输出信号的方法和系统，每个输出信号具有相同的频率但与另一个输出具有不同的相移。 在具有多个输出的FIR滤波器中，确定具有阻抗值的电阻器或其他元件的值，使得每个输出具有与其它输出相同的频率响应但不同的相位。 这是通过在不改变频域响应的电阻值的时域计算中包括相位因子来实现的。 相移是恒定的，与输出信号的频率无关。