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.

公开(公告)号：US20070290741A1

公开(公告)日：2007-12-20

申请号：US11849043

申请日：2007-08-31

Applicant: Leonard Forbes ,  David Cuthbert

Inventor： Leonard Forbes ,  David Cuthbert

IPC: H03F1/48

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增加开关电容放大器的信噪比，即使开关电容放大器处于正反馈布置

公开(公告)号：US20070030059A1

公开(公告)日：2007-02-08

申请号：US11196117

申请日：2005-08-03

Applicant: Leonard Forbes ,  David Cuthbert

Inventor： Leonard Forbes ,  David Cuthbert

IPC: H03F1/02

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, 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 Complementary Metal Oxide Semiconductor (CMOS) amplifier, a feed-in switched capacitor, and a feedback switched capacitor. The feed-in switched capacitor operably couples an input signal to the non-inverting input of the CMOS amplifier. Similarly, the feedback switched capacitor operably 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 configured in a positive feedback arrangement.

Abstract translation: 本发明包括开关电容放大器，其包括正反馈，半导体器件，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。 一个实施例包括开关电容放大器，其包括互补金属氧化物半导体（CMOS）放大器，馈入开关电容器和反馈开关电容器。 馈入开关电容器将输入信号可操作地耦合到CMOS放大器的非反相输入端。 类似地，反馈开关电容器可操作地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，并增加开关电容放大器的信噪比，即使开关电容放大器以正反馈布置配置。

公开(公告)号：US20060250871A1

公开(公告)日：2006-11-09

申请号：US11485218

申请日：2006-07-12

Applicant: Leonard Forbes ,  David Cuthbert

Inventor： Leonard Forbes ,  David Cuthbert

IPC: G11C7/00

CPC classification number: G11C27/026 ,  G11C7/062 ,  G11C11/4091

Abstract: A memory sense amplifier includes a sample and hold circuit followed by a differential amplifier. The sample and hold circuit samples a reference voltage on a bit line of a memory circuit when the sense amplifier is reset and a signal voltage on the same bit line when a signal representing a data bit is present in the bit line. The differential amplifier amplifies the difference between the signal voltage and the reference voltage.