专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4425551A Differential amplifier stage having bias compensating means 失效
标题翻译：差分放大器级具有偏置补偿装置
公开(公告)号：US4425551A
公开(公告)日：1984-01-10
申请号：US247649
申请日：1981-03-26
申请人： David E. Blackmer , David R. Welland
发明人： David E. Blackmer , David R. Welland
IPC分类号： H03F3/45
CPC分类号： H03F3/45479
摘要： An improved amplifier of the type comprising bipolar transistor means coupled between the input terminal of the amplifier and a differential pair of transistors. Compensation means is provided for generating a compensating signal through the bipolar transistor means such that the bipolar transistor means and compensation means reduce the amount of bias current drawn from the input signal to the amplifier. Other aspects of the present invention include the provision of reducing DC offset voltages between each side of the differential amplifier due to the operation of the device with its input terminals at different voltage levels, and the provision of a zero in the transfer characteristics of the amplifier to mitigate the effects of poles provided in the transfer characteristics.
摘要翻译：一种改进的放大器，其类型包括耦合在放大器的输入端和差分对晶体管之间的双极晶体管装置。提供补偿装置用于通过双极晶体管装置产生补偿信号，使得双极晶体管装置和补偿装置减少从输入信号汲取到放大器的偏置电流量。本发明的其它方面包括由于器件的操作使其输入端子处于不同的电压电平而在差分放大器的每一侧之间提供减小的DC偏移电压，并且在放大器的传输特性中提供零值以减轻传递特性中提供的极点的影响。

2. 发明授权

US4473793A Bias generator 失效
标题翻译：偏置发电机
公开(公告)号：US4473793A
公开(公告)日：1984-09-25
申请号：US247648
申请日：1981-03-26
申请人： David E. Blackmer , David R. Welland
发明人： David E. Blackmer , David R. Welland
IPC分类号： H03F1/30 , G05F3/08
CPC分类号： H03F1/307 , Y10S323/907
摘要： An improved bias generator provides a bias voltage output which is a function of an input current Iprog and provides a bias current to a preselected load which tracks the input signal independently of temperature. The amount the bias voltage output changes with temperature is determined by (1) V(T, Iprog), a voltage-current temperature dependent function of the base-emitter voltage drop of at least one transistor and (2) X, a scalar which is easily provided by setting the ratio of two resistors. The generator can therefore be easily constructed for particular circuit loads which include at least one semiconductive junction such that the biasing current through the load will be substantially independent of temperature.
摘要翻译：改进的偏置发生器提供偏置电压输出，其是输入电流Iprog的函数，并且将偏置电流提供给独立于温度跟踪输入信号的预选负载。偏置电压输出随温度变化的量由（1）V（T，Iprog）确定，V（T，Iprog）是至少一个晶体管的基极 - 发射极电压降的电压 - 电流温度依赖函数，（2）X，标量通过设置两个电阻的比例容易提供。因此，发电机可以容易地构建用于特定电路负载，其包括至少一个半导体结，使得通过负载的偏置电流将基本上与温度无关。

3. 发明授权

US4377792A Compander system 失效
标题翻译：压缩系统
公开(公告)号：US4377792A
公开(公告)日：1983-03-22
申请号：US387822
申请日：1982-06-14
申请人： David E. Blackmer , David R. Welland
发明人： David E. Blackmer , David R. Welland
IPC分类号： H03G1/00 , H03G7/00 , H04B1/64
CPC分类号： H03G7/002 , H03G1/0005
摘要： A signal conditioning system comprises an improved gain control module 10 and an improved detector 12 which are adapted to be manufactured in integrated circuit form.
摘要翻译：信号调节系统包括改进的增益控制模块10和改进的检测器12，其适于以集成电路形式制造。

4. 发明授权

US09095041B2 Method and apparatus for reducing interference 有权
公开(公告)号：US09095041B2
公开(公告)日：2015-07-28
申请号：US11930804
申请日：2007-10-31
申请人： David R. Welland , Donald A. Kerth , Caiyi Wang
发明人： David R. Welland , Donald A. Kerth , Caiyi Wang
IPC分类号： H03K5/00 , H05K9/00 , H03L7/18 , H05K1/02 , H05K3/10
CPC分类号： H05K9/00 , H03L7/18 , H05K1/0216 , H05K3/10 , Y10T29/49124
摘要： A method and apparatus is provided for reducing interference in circuits. A management strategy is provided to reduce reference spurs and interference in circuits. The management strategy uses a combination of one or more techniques which reduce the digital current, minimize mutual inductance, utilize field cancellation, prevent leakage current, and/or manage impedance. These techniques may be used alone, or preferably, used on combination with one another.

5. 发明申请

US20120169659A1 APPARATUS FOR CAPACITANCE SENSOR WITH INTERFERENCE REJECTION AND ASSOCIATED METHODS 审中-公开
标题翻译：具有干扰抑制和相关方法的电容传感器装置
公开(公告)号：US20120169659A1
公开(公告)日：2012-07-05
申请号：US13335407
申请日：2011-12-22
申请人： David R. Welland
发明人： David R. Welland
IPC分类号： G06F3/045
CPC分类号： G06F3/044 , G06F3/0416
摘要： A method for interfacing with a capacitive touch screen is disclosed. The method includes charging an internal capacitor in the touch screen, which internal capacitor is disposed proximate a fixed location on the touch screen and is capable of changing in response to a touch at that location on the touch screen. After charging, value of the charge on the internal capacitor is determined in a manner to reduce effects of interference.
摘要翻译：公开了一种用于与电容式触摸屏接口的方法。该方法包括对触摸屏中的内部电容器进行充电，该内部电容器设置在触摸屏上的固定位置附近，并且能够响应于触摸屏上该位置处的触摸而改变。充电后，以减少干扰影响的方式确定内部电容器的电荷值。

6. 发明授权

US08154336B2 Method and apparatus for reducing interference 有权
标题翻译：减少干扰的方法和装置
公开(公告)号：US08154336B2
公开(公告)日：2012-04-10
申请号：US11930596
申请日：2007-10-31
申请人： David R. Welland , Donald A. Kerth , Caiyi Wang
发明人： David R. Welland , Donald A. Kerth , Caiyi Wang
IPC分类号： H03K5/00
CPC分类号： H05K9/00 , H03L7/18 , H05K1/0216 , H05K3/10 , Y10T29/49124
摘要： A method and apparatus is provided for reducing interference in circuits. A management strategy is provided to reduce reference spurs and interference in circuits. The management strategy uses a combination of one or more techniques which reduce the digital current, minimize mutual inductance, utilize field cancellation, prevent leakage current, and/or manage impedance. These techniques may be used alone, or preferably, used on combination with one another.
摘要翻译：提供一种减少电路干扰的方法和装置。提供管理策略，以减少参考杂散和电路干扰。管理策略使用一种或多种减少数字电流，最小化互感，利用场消除，防止泄漏电流和/或管理阻抗的技术的组合。这些技术可以单独使用，或者优选地彼此组合使用。

7. 发明申请

US20100102876A1 METHOD AND APPARATUS FOR REDUCING INTERFERENCE 审中-公开
公开(公告)号：US20100102876A1
公开(公告)日：2010-04-29
申请号：US12650545
申请日：2009-12-31
申请人： David R. Welland , Donald A. Kerth , Caiyi Wang
发明人： David R. Welland , Donald A. Kerth , Caiyi Wang
IPC分类号： H03B1/04
CPC分类号： H05K9/00 , H03L7/18 , H05K1/0216 , H05K3/10 , Y10T29/49124
摘要： A method and apparatus is provided for reducing interference in circuits. A management strategy is provided to reduce reference spurs and interference in circuits. The management strategy uses a combination of one or more techniques which reduce the digital current, minimize mutual inductance, utilize field cancellation, prevent leakage current, and/or manage impedance. These techniques may be used alone, or preferably, used on combination with one another.

8. 发明授权

US07522193B2 Histogram-based automatic gain control method and system for video applications 有权
标题翻译：基于直方图的自动增益控制方法和视频应用系统
公开(公告)号：US07522193B2
公开(公告)日：2009-04-21
申请号：US10862488
申请日：2004-06-07
申请人： Nadi R. Itani , Caiyi Wang , David R. Welland
发明人： Nadi R. Itani , Caiyi Wang , David R. Welland
IPC分类号： H04N5/235 , H04N5/228 , H04N5/217
CPC分类号： H04N5/2352
摘要： An image processor system for a charge coupled device (CCD) or CMOS imaging system includes a histogram-based automatic gain control (AGC) circuit which first controls gain by adjusting said CCD system and then for yet a higher gain level makes gain adjustments in said CDSVGA circuit and a digital gain circuit to produce a combined target gain level. A processing system for an imager device includes a camera system for producing an imager signal, a correlated double sample (CDS) circuit for receiving data from an imager, a variable gain amplifier (VGA), an analog-to-digital converter (ADC) coupled to said CDS circuit, a digital gain circuit (DGC) coupled to said ADC, and an automatic gain control (AGC) circuit coupled to said DGC for controlling the CDS circuit and the DGC, as well as shutter timing for shutter gain.
摘要翻译：用于电荷耦合器件（CCD）或CMOS成像系统的图像处理器系统包括基于直方图的自动增益控制（AGC）电路，其首先通过调整所述CCD系统来控制增益，然后对于较高的增益电平进行增益，使所述 CDSVGA电路和数字增益电路，以产生组合的目标增益电平。一种用于成像器件的处理系统包括用于产生成像器信号的相机系统，用于从成像器接收数据的相关双样本（CDS）电路，可变增益放大器（VGA），模数转换器（ADC）耦合到所述CDS电路，耦合到所述ADC的数字增益电路（DGC）以及耦合到所述DGC的用于控制CDS电路和DGC的自动增益控制（AGC）电路以及用于快门增益的快门定时。

9. 发明授权

US07515672B2 Digital access arrangement circuitry and method for connecting to phone lines having a DC holding circuit with programmable current limiting 失效
标题翻译：用于连接到具有可编程限流的DC保持电路的电话线路的数字接入配置电路和方法
公开(公告)号：US07515672B2
公开(公告)日：2009-04-07
申请号：US10679013
申请日：2003-10-03
申请人： Timothy J. Dupuis , George Tyson Tuttle , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
发明人： Timothy J. Dupuis , George Tyson Tuttle , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
IPC分类号： H04L23/00
CPC分类号： H04L25/06 , H04L7/033 , H04L25/0266 , H04M11/06 , H04M19/001
摘要： A digital direct access arrangement (DAA) circuitry may be used to terminate the telephone connections at the user's end that provides a communication path for signals to and from the phone lines. Briefly described, the DAA provides a programmable circuit for the DC termination for a variety of international phone standards. The invention may also be utilized with circuitry for transmitting and receiving a signal across a capacitive isolation barrier. More particularly, a DC holding circuit is provided in which a programmable DC current limiting mode is available. In the current limiting mode, power may be dissipated in devices external to a DAA integrated circuit. Moreover, much of the power may be dissipated in external passive devices, such as resistors.
摘要翻译：可以使用数字直接访问布置（DAA）电路来终止在用户端的电话连接，其提供用于到达和来自电话线的信号的通信路径。简要描述，DAA为各种国际电话标准的DC终端提供可编程电路。本发明还可以用于跨电容隔离屏障发送和接收信号的电路。更具体地，提供了一种DC可编程直流限流模式可用的直流保持电路。在限流模式下，功率可能会在DAA集成电路外部的器件中耗散。此外，大部分功率可能会在外部无源器件（如电阻）中消散。

10. 发明授权

US07362841B2 Digital access arrangement circuitry and method for connecting to phone lines having a DC holding circuit with switchable DC termination impedance 失效
标题翻译：用于连接到具有可切换DC终端阻抗的DC保持电路的电话线路的数字接入布置电路和方法
公开(公告)号：US07362841B2
公开(公告)日：2008-04-22
申请号：US10292290
申请日：2002-11-12
申请人： Timothy J. Dupuis , George Tyson Tuttle , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
发明人： Timothy J. Dupuis , George Tyson Tuttle , Jeffrey W. Scott , Navdeep S. Sooch , David R. Welland
IPC分类号： H04L23/00
CPC分类号： H04L25/06 , H04L7/033 , H04L25/0266 , H04M11/06 , H04M19/001
摘要： A digital direct access arrangement (DAA) circuitry may be used to terminate the telephone connections at the user's end that provides a communication path for signals to and from the phone lines. Briefly described, the DAA provides a programmable means for the DC termination for a variety of international phone standards. The invention may also be utilized with means for transmitting and receiving a signal across a capacitive isolation barrier. More particularly, a DC holding circuit is provided in which a programmable DC current limiting mode is available. In the current limiting mode, power may be dissipated in devices external to a DAA integrated circuit. Moreover, much of the power may be dissipated in external passive devices, such as resistors.
摘要翻译：可以使用数字直接访问布置（DAA）电路来终止在用户端的电话连接，其提供用于到达和来自电话线的信号的通信路径。简要描述，DAA提供用于各种国际电话标准的DC终端的可编程装置。本发明还可以用于在电容隔离屏障上传输和接收信号的装置。更具体地，提供了一种DC可编程直流限流模式可用的直流保持电路。在限流模式下，功率可能会在DAA集成电路外部的器件中耗散。此外，大部分功率可能会在外部无源器件（如电阻）中消散。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式