公开(公告)号：US07612322B2

公开(公告)日：2009-11-03

申请号：US11675486

申请日：2007-02-15

申请人： Richard Kok Keong Lum ,  Lei Chen

发明人： Richard Kok Keong Lum ,  Lei Chen

IPC分类号： G01J1/44 ,  H03F3/08 ,  H04B10/06

CPC分类号： H03F3/087 ,  G01J1/44 ,  H03F3/45475 ,  H03F2200/447 ,  H03F2200/453 ,  H03F2203/45138 ,  H03F2203/45518

摘要： A light sensor having a photocurrent subsection and an interface circuit is disclosed. The photocurrent subsection includes a photodetector, an amplifier, a diode and an impedance element. The first photodetector generates a current between a first node and a power rail in response to being illuminated with light. The interface circuit generates an output signal that is related to the logarithm of the intensity of light that is incident on the photodetector. The impedance element is constructed in a manner that compensates for the thermal dependency of the impedance through the diode. Additional photocurrent subsections can be added to further reduce the thermal dependency of the output signal.

摘要翻译： 公开了具有光电流部分和接口电路的光传感器。 光电流部分包括光电检测器，放大器，二极管和阻抗元件。 第一光电检测器响应于被光照亮而在第一节点和电源轨之间产生电流。 接口电路产生与入射在光电检测器上的光强度的对数有关的输出信号。 阻抗元件以补偿通过二极管的阻抗的热依赖性的方式构造。 可以添加额外的光电流子部分以进一步降低输出信号的热依赖性。

公开(公告)号：US07605660B1

公开(公告)日：2009-10-20

申请号：US11938721

申请日：2007-11-12

申请人： Kevin W. Kobayashi

发明人： Kevin W. Kobayashi

IPC分类号： H03F3/08

CPC分类号： H03F3/087 ,  H03F1/083 ,  H03F1/32 ,  H03F3/45085 ,  H03F3/45484 ,  H03F2203/45392 ,  H03F2203/45652 ,  H03G3/3084

摘要： An apparatus comprising a first amplifier circuit, a detect circuit, a control circuit and a second amplifier circuit. The first amplifier circuit may be configured to generate an amplified signal in response to an input signal. The detect circuit may be configured to generate a feed-forward signal in response to the amplified signal. The control circuit may be configured to generate a dynamic control signal in response to the feed-forward signal. The second amplifier circuit may be configured to generate an output signal in response to (i) the amplified signal and (ii) the dynamic control signal. The control circuit may be configured to control a gain of the second amplifier circuit by adjusting a magnitude of the dynamic control signal.

摘要翻译： 一种装置，包括第一放大器电路，检测电路，控制电路和第二放大器电路。 第一放大器电路可以被配置为响应于输入信号而产生放大信号。 检测电路可以被配置为响应于放大的信号产生前馈信号。 控制电路可以被配置为响应于前馈信号而产生动态控制信号。 第二放大器电路可以被配置为响应于（i）放大信号和（ii）动态控制信号而产生输出信号。 控制电路可以被配置为通过调整动态控制信号的大小来控制第二放大器电路的增益。

公开(公告)号：US07501898B2

公开(公告)日：2009-03-10

申请号：US11271074

申请日：2005-11-10

申请人： Fun Kok Chow

发明人： Fun Kok Chow

IPC分类号： H03F3/08 ,  H03K19/0175

CPC分类号： H03F3/087 ,  H03F1/08 ,  H03F2200/78 ,  H03F2203/45136

摘要： In one embodiment, apparatus is provided with current optimization logic, a programmable current source for generating a reference current threshold, and current programming logic. In response to a plurality of input pulses received by a first TIA, the current optimization logic produces a series of digitized current values in response to i) a signal correlated to an output of the first TIA, to ii) a reference signal to which the output of the first TIA is compared. The current programming logic i) programs the programmable current source using ones of the series of digitized current values, until a predetermined condition is met, and then ii) locks the programmable current source to a most recent one of the digitized current values. In response to the reference current threshold, a second TIA produces the reference signal.

摘要翻译： 在一个实施例中，设备具有当前优化逻辑，用于产生参考电流阈值的可编程电流源和当前编程逻辑。 响应于由第一TIA接收的多个输入脉冲，当前优化逻辑响应于i）与第一TIA的输出相关的信号而产生一系列数字化的电流值，ii）参考信号， 比较第一TIA的输出。 当前编程逻辑i）使用一系列数字化电流值中的一个数字化电流值来编程可编程电流源，直到满足预定条件，然后ii）将可编程电流源锁定到数字化电流值中的最近一个。 响应于参考电流阈值，第二TIA产生参考信号。

公开(公告)号：US20090051442A1

公开(公告)日：2009-02-26

申请号：US12193984

申请日：2008-08-19

申请人： Ja-Won SEO ,  Yun Ah SIM ,  Sang-Gug LEE

发明人： Ja-Won SEO ,  Yun Ah SIM ,  Sang-Gug LEE

IPC分类号： H03F3/08

CPC分类号： H03F3/087 ,  H03F1/083

摘要： A transimpedance amplifier circuit for an optical receiver in an optical communication system in which a range of an increase/decrease in bandwidth according to gain change is reduced by a bandwidth adjustor. The circuit includes: a photodiode (PD) for generating a current signal by photoelectric conversion of an input optical signal; a Transimpedance Amplifier (TIA) for converting the current signal input from the photodiode into a voltage signal; an auto gain adjustor for adjusting feedback resistances of the transimpedance amplifier; a photodiode parallel capacitor reducer for reducing a parallel capacitor current of the photodiode; and a bandwidth adjustor for reducing a range of an increase/decrease in bandwidth according to an increase/decrease in gain of the transimpedance amplifier.

摘要翻译： 一种用于光通信系统中的光接收机的跨阻放大器电路，其中通过带宽调节器减小根据增益变化的带宽增加/减小的范围。 该电路包括：用于通过输入光信号的光电转换产生电流信号的光电二极管（PD）; 用于将从光电二极管输入的电流信号转换为电压信号的跨阻抗放大器（TIA）; 用于调整跨阻放大器的反馈电阻的自动增益调节器; 用于减小光电二极管的并联电容电流的光电二极管并联电容器减速器; 以及带宽调整器，用于根据跨阻放大器的增益的增加/减小来减小带宽的增加/减小的范围。

公开(公告)号：US20090032683A1

公开(公告)日：2009-02-05

申请号：US12000093

申请日：2007-12-07

申请人： George Karl Knopf ,  Wei Wei Wang ,  Amarjeet S. Bassi

发明人： George Karl Knopf ,  Wei Wei Wang ,  Amarjeet S. Bassi

IPC分类号： H01L27/00 ,  H03F3/08

CPC分类号： H03F3/087 ,  B82Y10/00 ,  G01J1/42 ,  G01J1/44 ,  G01J3/50 ,  H01L27/307 ,  H01L51/0012 ,  H01L51/0024 ,  H01L51/0093 ,  H01L51/0097 ,  H01L51/4206 ,  Y02E10/549

摘要： The direct deposit of photoelectric materials onto low-cost prefabricated patterned flexible electrodes provided by the present invention introduces a new design approach that permits the development of innovative lightweight, durable and non-planar sensing systems. By extending single and multi-spectral bioelectronic sensing technology to flexible plastic substrates, the invention offers a number of potential advantages over structurally rigid silicon-based microelectronics (e.g. CMOS) including a reduction in spatial requirements, weight, electrical power consumption, heat loss, system complexity, and fabrication cost.

公开(公告)号：US20090008534A1

公开(公告)日：2009-01-08

申请号：US11886145

申请日：2006-03-13

申请人： Takashi Suzuki ,  Yoshitaka Terada

发明人： Takashi Suzuki ,  Yoshitaka Terada

IPC分类号： H03F3/08

CPC分类号： G01J1/44 ,  G01J1/46 ,  H03F3/087

摘要： A photodetecting circuit includes an adder that selectively adds outputs of a plurality of circuits for photodetection. Each of the circuits for photodetection includes: a element for photodetecting; a transimpedance amplifier for photodetection, with a first input terminal connected to the photodetecting element; a transconductance amplifier, with a first input terminal connected to an output terminal of the transimpedance amplifier; and a feedback circuit, connected between the output terminal of the transimpedance amplifier for photodetection and the first input terminal of the transimpedance amplifier for photodetection and applying feedback to keep fixed an output voltage of the transimpedance amplifier for photodetection.

摘要翻译： 光检测电路包括：加法器，其选择性地将多个电路的输出相加以进行光电检测。 用于光电检测的每个电路包括：用于光电检测的元件; 用于光电检测的跨阻抗放大器，其中第一输入端连接到光电检测元件; 跨导放大器，其中第一输入端连接到跨阻放大器的输出端; 以及反射电路，连接在用于光电检测的跨阻放大器的输出端和用于光电检测的跨阻放大器的第一输入端子之间，并施加反馈以保持用于光电检测的跨阻放大器的输出电压。

公开(公告)号：US20080204567A1

公开(公告)日：2008-08-28

申请号：US11678293

申请日：2007-02-23

申请人： Weize Xu

发明人： Weize Xu

IPC分类号： H04N5/228

CPC分类号： H03F3/505 ,  H03F3/005 ,  H03F3/082 ,  H03F3/087 ,  H03F3/45475 ,  H03F3/45744 ,  H03F3/45968 ,  H03F2200/375 ,  H03F2203/45136 ,  H03F2203/45551 ,  H03F2203/45586 ,  H03F2203/45588 ,  H03F2203/45612 ,  H04N5/3575 ,  H04N5/374 ,  H04N5/378

摘要： An active pixel image sensor comprising: (a) a pixel array having a plurality of pixels, each pixel comprising: (i) a photosensitive region connected to a charge-to-voltage conversion region; and (ii) an amplifier connected to the charge-to-voltage conversion region; and (b) a sample and hold circuit connected to one or more pixels comprising: (i) two capacitors for receiving and storing a reset signal and an image signal; (ii) two buffer amplifiers for respectively receiving the reset signal and the image signal respectively from the two capacitors; and (iii) a reference generator circuit connected to an input of the buffer amplifiers for removing offset of the buffer amplifier.

摘要翻译： 一种有源像素图像传感器，包括：（a）具有多个像素的像素阵列，每个像素包括：（i）连接到电荷 - 电压转换区域的感光区域; 和（ii）连接到电荷 - 电压转换区的放大器; 和（b）连接到一个或多个像素的采样和保持电路，包括：（i）用于接收和存储复位信号和图像信号的两个电容器; （ii）两个缓冲放大器，用于分别从两个电容器接收复位信号和图像信号; 和（iii）参考发生器电路，连接到缓冲放大器的输入端，用于去除缓冲放大器的偏移。

公开(公告)号：US07411460B2

公开(公告)日：2008-08-12

申请号：US11372793

申请日：2006-03-10

申请人： Richard W. Randlett

发明人： Richard W. Randlett

IPC分类号： H03F3/08

CPC分类号： H03F3/087 ,  H03F1/08 ,  H03F3/45475 ,  H03F3/45928 ,  H03F3/45941 ,  H03F2203/45061 ,  H03F2203/45078 ,  H03F2203/45424 ,  H03F2203/45561

摘要： A voltage reference forces a constant voltage at the inputs to an amplifier, thereby negating a need for a dummy detector on the non-active input of the amplifier.

摘要翻译： 电压基准在放大器的输入端施加恒定电压，从而不需要在放大器的非有效输入端上的虚拟检测器。

公开(公告)号：US20080179501A1

公开(公告)日：2008-07-31

申请号：US12076788

申请日：2008-03-24

申请人： Hiroshi Yamaguchi ,  Masaki Taniguchi

发明人： Hiroshi Yamaguchi ,  Masaki Taniguchi

IPC分类号： G01J1/44

CPC分类号： H03F3/3069 ,  H03F1/08 ,  H03F1/56 ,  H03F3/08 ,  H03F3/087 ,  H03F3/343

摘要： A photo detector IC (PDIC) is connected with a flexible printed circuit board (FPC). A signal converted into a voltage through light-to-voltage conversion in the PDIC is connected with the drain of a field effect transistor (FET), while the source of the FET is connected to an output terminal. A signal from the output terminal is input into a signal processing board of the main body via the FPC serving as an equivalent circuit composed of a coil and a capacitor. The gate of the FET is connected with a variable voltage source. Peaking occurs due to inductor components and capacitance components of the FPC. However, by application of voltage to the variable voltage source, the gate voltage value of the FET is adjusted to be an optimal value, whereby the peaking is suppressed by the on-resistance of the FET.

公开(公告)号：US20080142687A1

公开(公告)日：2008-06-19

申请号：US12002386

申请日：2007-12-17

申请人： Wei Zhou ,  Yi-Yin Chen

发明人： Wei Zhou ,  Yi-Yin Chen

IPC分类号： H03F3/08

CPC分类号： H03F3/087 ,  G09G3/3406 ,  G09G2320/0633 ,  G09G2360/144 ,  H03F3/45475 ,  H03F2203/45136

摘要： An exemplary driving circuit (400) for a backlight module includes a control circuit (420), a first driving branch circuit (440), a second driving branch circuit (450), and a light source (430). The control circuit is configured for providing a driving signal to the light source via the first driving branch circuit, and the second driving branch circuit is configured for providing a substitution driving signal to the light source according to intensity of ambient light beams. The first and second driving branch circuits are configured for driving the light source alternatively.

摘要翻译： 用于背光模块的示例性驱动电路（400）包括控制电路（420），第一驱动分支电路（440），第二驱动分支电路（450）和光源（430）。 控制电路被配置为经由第一驱动分支电路向光源提供驱动信号，并且第二驱动分支电路被配置为根据环境光束的强度向光源提供替代驱动信号。 第一和第二驱动分支电路被配置为交替地驱动光源。