公开(公告)号：US06675313B2

公开(公告)日：2004-01-06

申请号：US10329494

申请日：2002-12-27

Applicant: David Cuthbert

Inventor： David Cuthbert

IPC: G06F104

CPC classification number: H05K1/0248 ,  G06F1/10 ,  H05K1/0293 ,  H05K3/027 ,  H05K2201/09263 ,  H05K2201/0969 ,  H05K2201/09736 ,  H05K2201/0979 ,  H05K2203/095 ,  H05K2203/107 ,  H05K2203/1115 ,  H05K2203/1338 ,  H05K2203/171 ,  H05K2203/175

Abstract: An apparatus and method are described for reducing the timing skew on a printed circuit board including a plurality of conductive traces interconnecting a first node and a second node. At least one section is removed from at least one printed circuit board trace to thereby sever a trace and prevent signals passing from the first node to the second node from following the severed trace. In this manner, signal path length can be adjusted to reduce timing skews in the circuit. Sections are removed from the traces by using a laser, CVD, a router, a plasma or by passing sufficient current through weakened areas of the traces.

Abstract translation: 描述了一种用于减少包括互连第一节点和第二节点的多个导电迹线的印刷电路板上的定时偏移的装置和方法。 至少一个部分从至少一个印刷电路板迹线移除，从而切断迹线并防止从第一节点传递到第二节点的信号不跟随切断的迹线。 以这种方式，可以调整信号路径长度以减少电路中的定时偏差。 通过使用激光，CVD，路由器，等离子体或者通过使足够的电流通过弱化区域从迹线中去除部分。

公开(公告)号：US20070054550A1

公开(公告)日：2007-03-08

申请号：US11278541

申请日：2006-04-03

Applicant: David Cuthbert ,  Larry Rogel ,  Matthew Page ,  James Page

Inventor： David Cuthbert ,  Larry Rogel ,  Matthew Page ,  James Page

IPC: H01R13/648

CPC classification number: H01R29/00 ,  H01R27/02 ,  H01R2201/04 ,  H01R2201/06

Abstract: An apparatus which provides the ability to charge or power multiple devices from multiple different power sources, and to communicate electronic data to and from one of the devices. The apparatus utilizes simple construction, requiring no active electronics, thereby reducing the cost of production and the reliability of the device. The apparatus employs a single USB connection cable with connectors on both ends and a second power-only cable and connector which is connected to the power wires of the USB cable and thereby is able to power a second portable device from a single USB port. USB master provide sufficient power for two average portable devices without additional circuitry. Moreover, restricting the data path to only one device also eliminates the need for USB hub circuitry. Finally, greater end user flexibility is provided by using a USB male connector as the source of the data and power connection, a USB female connector for the output of the data and power connection, and a standard barrel-type power connector for the power-only output connection. Having two different output connectors ensures that the user will not confuse the two connectors.

Abstract translation: 一种提供从多个不同电源对多个设备进行充电或供电的能力以及将电子数据传送到设备之一或从设备之一传送电子数据的设备。 该设备采用简单的结构，不需要有源电子元件，从而降低了生产成本和设备的可靠性。 该装置采用单个USB连接电缆，其两端具有连接器，以及第二电源电缆和连接器，其连接到USB电缆的电源线，从而能够从单个USB端口为第二便携式设备供电。 USB主机为两个平均的便携式设备提供足够的电力，无需额外的电路。 而且，将数据路径限制在一个设备上也不需要USB集线器电路。 最后，通过使用USB公连接器作为数据和电源连接的来源，提供用于输出数据和电源连接的USB母连接器以及用于电源连接的标准机筒式电源连接器来提供更大的终端用户灵活性， 只输出连接。 具有两个不同的输出连接器可确保用户不会混淆两个连接器。

公开(公告)号：US20050206400A1

公开(公告)日：2005-09-22

申请号：US11142226

申请日：2005-06-01

Applicant: William Casey ,  David Cuthbert ,  Olivia McGrew

Inventor： William Casey ,  David Cuthbert ,  Olivia McGrew

IPC: G01R31/28 ,  H05K1/02 ,  H05K1/11 ,  G01R31/02

CPC classification number: H05K1/0268 ,  G01R31/2889 ,  H05K1/112 ,  H05K2201/09781

Abstract: An integrated circuit characterization printed circuit board and method are provided for improving the uniformity of impedance introduced by a test fixture across all of the pins of an integrated circuit device. The printed circuit board includes an array of substantially similar test contacts numbering greater than the pins of the integrated circuit device. The array of test contacts includes an active portion configured for electrically coupling with the corresponding pins on the integrated circuit device and an inactive portion adjacent to the active portion and electrically coupled to a reference signal on the printed circuit board.

Abstract translation: 提供了一种集成电路表征印刷电路板和方法，用于改善由集成电路器件的所有引脚上的测试夹具引入的阻抗的均匀性。 印刷电路板包括大致类似的测试触头的阵列，编号大于集成电路器件的引脚。 测试触点阵列包括被配置用于与集成电路器件上的相应引脚电耦合的有源部分和与有源部分相邻的非活动部分，并电耦合到印刷电路板上的参考信号。

公开(公告)号：US20060291312A1

公开(公告)日：2006-12-28

申请号：US11494027

申请日：2006-07-27

Applicant: Leonard Forbes ,  David Cuthbert

Inventor： Leonard Forbes ,  David Cuthbert

IPC: G11C7/02

CPC classification number: H03F3/45183 ,  H03F1/08 ,  H03F1/14 ,  H03F3/45273 ,  H03F2203/45264 ,  H03F2203/45332

Abstract: The frequency and transient responses of a CMOS differential amplifier are improved by employing one or more compensating capacitors. A compensating capacitor coupled to a differential input of the CMOS differential amplifier is used to inject current into the differential input, such that the net current flow through the gate-to-drain capacitance of a MOS input transistor approaches zero. Thus, the Miller effect with respect to that MOS input transistor is substantially reduced or eliminated, resulting in increased frequency and transient responses for the CMOS differential amplifier. In one embodiment, the CMOS differential amplifier is a CMOS current mirror differential amplifier.

Abstract translation: CMOS差分放大器的频率和瞬态响应通过采用一个或多个补偿电容来改善。 耦合到CMOS差分放大器的差分输入的补偿电容器用于将电流注入到差分输入端中，使得通过MOS输入晶体管的栅 - 漏电容的净电流流过零。 因此，相对于该MOS输入晶体管的米勒效应被显着降低或消除，导致CMOS差分放大器的频率和瞬态响应增加。 在一个实施例中，CMOS差分放大器是CMOS电流镜差分放大器。

公开(公告)号：US20060268140A1

公开(公告)日：2006-11-30

申请号：US11135520

申请日：2005-05-24

Applicant: Leonard Forbes ,  David Cuthbert

Inventor： Leonard Forbes ,  David Cuthbert

IPC: H04N5/335

CPC classification number: H04N5/378 ,  H04N5/3575 ,  H04N5/3651

Abstract: A technique for reducing 1/f noise in an imager, in which the source follower transistor in a pixel circuit is turned off prior to a correlated double sampling (CDS) operation, thereby reducing 1/f noise in the source follower transistor for up to 100 ms. The source follower transistor is then reactivated and a CDS operation and readout is performed normally. This technique substantially reduces the contributions of 1/f noise. The invention also provides a reduction of 1/f noise in an analog amplifier circuit which may process pixel output signals, or more generally, other analog signals, whereby the analog amplifier is turned off during an amplifier reset operation prior to signal amplification. The analog amplifier circuit may be a differential amplifier or a switched capacitor analog amplifier circuit.

Abstract translation: 用于降低成像器中1 / f噪声的技术，其中像素电路中的源极跟随器晶体管在相关双采样（CDS）操作之前被截止，从而减少源极跟随器晶体管中的1 / f噪声，直到 100毫秒 源极跟随器晶体管然后被重新激活，并且正常执行CDS操作和读出。 该技术大大降低了1 / f噪声的贡献。 本发明还提供可以处理像素输出信号或更一般地，其它模拟信号的模拟放大器电路中的1 / f噪声的减小，由此在信号放大之前的放大器复位操作期间模拟放大器被关断。 模拟放大器电路可以是差分放大器或开关电容器模拟放大器电路。

公开(公告)号：US20060261896A1

公开(公告)日：2006-11-23

申请号：US11493966

申请日：2006-07-27

Applicant: Leonard Forbes ,  David Cuthbert

Inventor： Leonard Forbes ,  David Cuthbert

IPC: H03F1/14

CPC classification number: H03F3/45183 ,  H03F1/08 ,  H03F1/14 ,  H03F3/45273 ,  H03F2203/45264 ,  H03F2203/45332

Abstract: The frequency and transient responses of a CMOS differential amplifier are improved by employing one or more compensating capacitors. A compensating capacitor coupled to a differential input of the CMOS differential amplifier is used to inject current into the differential input, such that the net current flow through the gate-to-drain capacitance of a MOS input transistor approaches zero. Thus, the Miller effect with respect to that MOS input transistor is substantially reduced or eliminated, resulting in increased frequency and transient responses for the CMOS differential amplifier. In one embodiment, the CMOS differential amplifier is a CMOS current mirror differential amplifier.

公开(公告)号：US20080007359A1

公开(公告)日：2008-01-10

申请号：US11900812

申请日：2007-09-13

Applicant: Leonard Forbes ,  David Cuthbert

Inventor： Leonard Forbes ,  David Cuthbert

IPC: H03B5/24

CPC classification number: H03K3/3545 ,  G06F1/10 ,  H03K5/14 ,  H03K5/15013

Abstract: One aspect relates to an oscillator, and various oscillator embodiments comprise an amplifier and line driver with an input and an output and a transmission line with a predetermined transmission signal time delay. The output is adapted to produce an inverted signal with respect to a signal received at the input. The transmission line has a first end connected to the output and a second end connected to the input. Other aspects and embodiments are provided herein.

Abstract translation: 一个方面涉及振荡器，并且各种振荡器实施例包括具有输入和输出的放大器和线路驱动器以及具有预定传输信号时间延迟的传输线。 该输出适于产生相对于在输入处接收到的信号的反相信号。 传输线具有连接到输出的第一端和连接到输入的第二端。 本文提供了其它方面和实施例。

公开(公告)号：US20070182482A1

公开(公告)日：2007-08-09

申请号：US11728537

申请日：2007-03-26

Applicant: Leonard Forbes ,  David Cuthbert

Inventor： Leonard Forbes ,  David Cuthbert

IPC: H03F1/36

CPC classification number: H03F3/005 ,  H03F1/26 ,  H03F1/38 ,  H03F3/45183 ,  H03F2203/45166 ,  H03F2203/45224 ,  H03F2203/45514 ,  H03F2203/45551 ,  H03F2203/45674 ,  H03F2203/45722

Abstract: The present invention comprises switched capacitor amplifiers including positive feedback on semiconductor devices, wafers, and systems incorporating same and methods for amplifying signals using positive feedback, while maintaining a stable gain and producing an improved signal-to-noise ratio. One embodiment includes a switched capacitor amplifier comprising a CMOS amplifier, a feed-in switched capacitor, and a feedback switched capacitor. The feed-in switched capacitor couples an input signal to the non-inverting input of the CMOS amplifier. Similarly, the feedback switched capacitor couples the amplifier output to the non-inverting input to create a positive feedback loop. A capacitance of the feedback switched capacitor relative to a capacitance of the feed-in switched capacitor comprises a feedback proportion. This feedback proportion may be configured to maintain a stable gain of the switched capacitor amplifier and increase a signal-to-noise ratio of the switched capacitor amplifier, even with the switched capacitor amplifier in a positive feedback arrangement.

Abstract translation: 本发明包括开关电容放大器，其包括对半导体器件的正反馈，晶圆及其结合的系统以及使用正反馈放大信号的方法，同时保持稳定的增益并产生改善的信噪比。 一个实施例包括具有CMOS放大器，馈入开关电容器和反馈开关电容器的开关电容放大器。 馈入开关电容将输入信号耦合到CMOS放大器的非反相输入。 类似地，反馈开关电容器将放大器输出耦合到非反相输入端以产生正反馈回路。 反馈开关电容器相对于馈入开关电容器的电容的电容包括反馈比例。 该反馈比例可以被配置为保持开关电容放大器的稳定增益，并且即使开关电容放大器处于正反馈布置中，也可提高开关电容放大器的信噪比。

公开(公告)号：US20070139115A1

公开(公告)日：2007-06-21

申请号：US11699953

申请日：2007-01-30

Applicant: Leonard Forbes ,  David Cuthbert

Inventor： Leonard Forbes ,  David Cuthbert

IPC: H03F3/45

CPC classification number: H03F3/45183 ,  H03F1/08 ,  H03F1/14 ,  H03F3/45273 ,  H03F2203/45264 ,  H03F2203/45332

Abstract: The frequency and transient responses of a CMOS differential amplifier are improved by employing one or more compensating capacitors. A compensating capacitor coupled to a differential input of the CMOS differential amplifier is used to inject current into the differential input, such that the net current flow through the gate-to-drain capacitance of a MOS input transistor approaches zero. Thus, the Miller effect with respect to that MOS input transistor is substantially reduced or eliminated, resulting in increased frequency and transient responses for the CMOS differential amplifier. In one embodiment, the CMOS differential amplifier is a CMOS current mirror differential amplifier.

公开(公告)号：US20070046385A1

公开(公告)日：2007-03-01

申请号：US11215665

申请日：2005-08-29

Applicant: Leonard Forbes ,  David Cuthbert

Inventor： Leonard Forbes ,  David Cuthbert

IPC: H03B5/18

CPC classification number: H03K3/3545 ,  G06F1/10 ,  H03K5/14 ,  H03K5/15013

Abstract: One aspect relates to an oscillator, and various oscillator embodiments comprise an amplifier and line driver with an input and an output and a transmission line with a predetermined transmission signal time delay. The output is adapted to produce an inverted signal with respect to a signal received at the input. The transmission line has a first end connected to the output and a second end connected to the input. Other aspects and embodiments are provided herein.