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    Selective address table aging in a network switch based on application state determined from a received data packet
    31.
    发明授权
    Selective address table aging in a network switch based on application state determined from a received data packet 有权
    基于从接收的数据包确定的应用状态，网络交换机中的选择性地址表老化

    公开(公告)号：US07002955B1

    公开(公告)日：2006-02-21

    申请号：US09519848

    申请日：2000-03-06

    Applicant: Mrudula Kanuri ,  Gopal Krishna

    Inventor： Mrudula Kanuri ,  Gopal Krishna

    IPC: H04L12/56

    CPC classification number: H04L12/4625 ,  H04L69/28

    Abstract: A network switch, configured for performing layer 2 and layer 3 switching in an Ethernet (IEEE 802.3) network without blocking of incoming data packets, includes a network switch port having a packet classifier module configured for evaluating an incoming data packet on an instantaneous basis. The packet classifier module performs simultaneous comparisons between the incoming data stream of the data packet and multiple templates configured for identifying respective data protocols. Each template is composed of a plurality of min terms, wherein each min term specifies a prescribed comparison operation within a selected data byte of the incoming data packet. Hence, the packet classifier module is able to monitor data flows between two network nodes interacting according to a prescribed network application. The packet classifier module determines the application state for a prescribed network application from a received layer 2 data packet, enabling switching logic within the network switch to utilize application-specific aging intervals for respective network applications such as HTTP, SNMP, ftp, Telnet, etc. in order to delete aged address entries from a network switch address table based on the supported network application. Determination of the application state from the received layer 2 data packet also enables the network switch to detect the end of a data flow for deletion of the corresponding address entry from the network switch address table.

    Abstract translation: 配置用于在以太网（IEEE 802.3）网络中执行层2和层3切换而不阻塞输入数据分组的网络交换机包括具有分组分类器模块的网络交换机端口，所述分组分类器模块被配置为即时地评估输入数据分组。 分组分类器模块执行数据分组的输入数据流和被配置用于识别相应数据协议的多个模板之间的同时比较。 每个模板由多个最小项组成，其中每个最小项指定输入数据分组的所选数据字节内的规定比较操作。 因此，分组分类器模块能够监视根据规定的网络应用交互的两个网络节点之间的数据流。 分组分类器模块从接收的第二层数据分组确定规定的网络应用的应用状态，使得网络交换机内的切换逻辑能够针对各种网络应用（如HTTP，SNMP，FTP，Telnet等）利用应用专用的老化时间间隔 以便基于所支持的网络应用从网络交换机地址表中删除老化的地址条目。 从接收到的第2层数据包确定应用程序状态还使网络交换机可以从网络交换机地址表中检测到删除相应地址条目的数据流的结束。

    Method and apparatus for prioritizing traffic in half-duplex networks by selecting delay intervals from fixed ranges
    32.
    发明授权
    Method and apparatus for prioritizing traffic in half-duplex networks by selecting delay intervals from fixed ranges 失效
    通过从固定范围中选择延迟间隔来优先考虑半双工网络中的流量的方法和装置

    公开(公告)号：US5822538A

    公开(公告)日：1998-10-13

    申请号：US752884

    申请日：1996-11-20

    Applicant: Gopal Krishna ,  Mohan Kalkunte ,  Robert Alan Williams

    Inventor： Gopal Krishna ,  Mohan Kalkunte ,  Robert Alan Williams

    IPC: G06F13/38 ,  G06F13/00

    CPC classification number: G06F13/385

    Abstract: Collision delay intervals are modified in Ethernet network devices by transmitting priority data requiring a guaranteed latency by determining an integer multiple number of slot times, randomly selected from a predetermined range of integers, where the range of integers is independent from the number of access attempts. A network device having priority data for transmission randomly selects a collision delay interval to be either zero or one slot time for a predetermined number of access attempts. If the number of collisions encountered by the network station exceeds the predetermined number, the integer is selected from a range of integers calculated from a shifted exponential number of the access attempts, resulting in a smaller range than used for normal priority traffic. Use of the collision mediation for high priority traffic on a half-duplex Ethernet network provides a bounded access latency for real-time and multimedia applications by granting the network device a higher probability of successfully accessing the network media.

    Abstract translation: 通过从整数的预定范围中随机选择的整数倍数的时隙时间，通过发送需要保证延迟的优先级数据来修改冲突延迟间隔，其中整数范围独立于接入尝试次数。 具有用于传输的优先级数据的网络设备在预定次数的访问尝试中随机选择冲突延迟间隔为零或一个时隙时间。 如果网络站遇到的冲突次数超过预定数量，则从从访问尝试的移位指数中计算出的整数范围中选择整数，导致比普通优先级流量使用的范围更小的范围。 在半双工以太网上使用冲突中介来实现高优先级流量，通过授予网络设备成功访问网络媒体的更高可能性，为实时和多媒体应用提供有界访问延迟。

    Automatic peak color control circuit
    33.
    发明授权
    Automatic peak color control circuit 失效
    自动峰值色彩控制电路

    公开(公告)号：US3962723A

    公开(公告)日：1976-06-08

    申请号：US488807

    申请日：1974-07-15

    Applicant: Gopal Krishna Srivastava

    Inventor： Gopal Krishna Srivastava

    IPC: H04N9/68 ,  H04N9/535

    CPC classification number: H04N9/68

    Abstract: In a television receiver having a chrominance signal channel coupled to a cathode ray tube, an automatic peak color control circuit includes an envelope detector means providing a combined chroma envelope and DC potential, a means for shifting the level of the combined chroma envelope and DC potential, a means for detecting the peak level of the chroma signal, and a means for comparing the detected peak chroma signal level and a reference potential level to provide a control signal for maintaining application of a substantially constant level of chroma signal to the cathode ray tube.

    Abstract translation: 在具有耦合到阴极射线管的色度信号通道的电视接收机中，自动色彩控制电路包括提供组合色度包络和DC电位的包络检测器装置，用于移动组合色度包络和DC电位的电平的装置 用于检测色度信号的峰值电平的装置，以及用于比较所检测的峰值色度信号电平和参考电位电平的装置，以提供用于维持对阴极射线管施加基本恒定的色度信号电平的控制信号 。

    Variable parameter tungsten-inert gas welding
    34.
    发明授权
    Variable parameter tungsten-inert gas welding 失效
    可变参数TUNGSTEN-INERT气体焊接

    公开(公告)号：US3610876A

    公开(公告)日：1971-10-05

    申请号：US3610876D

    申请日：1969-12-22

    Applicant: GOPAL KRISHNA BHAT

    Inventor： BHAT GOPAL KRISHNA

    IPC: B23K33/00 ,  B23K9/00

    CPC classification number: B23K33/004 ,  B23K2201/04

    Abstract: There is disclosed herein a modified Tungsten-Inert Gas welding process for joining relatively thick high-strength steel plates by depositing multiple layers of weld metal in a groove between the plates. For each layer, the arc voltage, arc current and feed rate of filler material are adjusted to provide uniform heat input to the weld for varying size weld deposits. The weld layers formed from the successive passes extend along the length and across the width of the weld groove, and are of substantially uniform thickness. The top one or two weld layers may be side-byside weld deposits which extend along the length of the joint and overlap intermediate the width of the groove. The weld groove is V-shaped and wide enough at its top to permit clearance of the welding electrodes when depositing the lowermost layer.

    Current detection circuit with over-current protection
    35.
    发明授权
    Current detection circuit with over-current protection 有权
    电流检测电路具有过流保护功能

    公开(公告)号：US09588155B2

    公开(公告)日：2017-03-07

    申请号：US14516555

    申请日：2014-10-16

    Applicant: Siddhartha Gopal Krishna ,  Ramji Gupta

    Inventor： Siddhartha Gopal Krishna ,  Ramji Gupta

    IPC: G01R31/02 ,  G01R19/165 ,  B60R21/01

    CPC classification number: G01R19/16571 ,  B60R21/01 ,  B60R2021/01068

    Abstract: Threshold detection for load current on a bus involves generating an output current representative of the load current using a transconductance circuit, sampling the output current during a quiescent phase of the bus to produce a sample current, generating a compensation current that is proportional to the transconductance gain associated with the transconductance circuit, where the compensation current is a function of the sample current, combining the output current, the sample current, the compensation current, and a reference current representative of a threshold value for the load current to produce a combined current, and using a discriminator during an active phase of the bus to output a first value when the sum current exceeds the threshold value and a second value when the combined current is less than the threshold value.

    Abstract translation: 总线上负载电流的阈值检测包括使用跨导电路产生代表负载电流的输出电流，在总线的静止阶段对输出电流进行采样以产生采样电流，产生与跨导成比例的补偿电流 与跨导电路相关联的增益，其中补偿电流是采样电流的函数，组合输出电流，采样电流，补偿电流和代表负载电流的阈值的参考电流以产生组合电流 并且当总和电流超过阈值时，在总线的有效相位期间使用鉴别器输出第一值，当组合电流小于阈值时，输出第二值。

    Method of trimming current source using on-chip ADC
    36.
    发明授权
    Method of trimming current source using on-chip ADC 有权
    使用片上ADC调整电流源的方法

    公开(公告)号：US09353017B2

    公开(公告)日：2016-05-31

    申请号：US14307472

    申请日：2014-06-17

    Applicant: Siddhartha Gopal Krishna ,  Vikram Varma

    Inventor： Siddhartha Gopal Krishna ,  Vikram Varma

    IPC: H03L5/00 ,  C05F3/02 ,  H03M1/12

    CPC classification number: C05F3/02 ,  G05F3/02 ,  H03M1/12 ,  H03M1/48 ,  Y02A40/206 ,  Y02P20/145

    Abstract: A method of trimming a current source in an IC includes deriving a reference voltage from an external supply, and developing a measurement voltage across an external reference resistance receiving the current to be trimmed. An on-chip ADC is used to provide corresponding digital reference and digital measurement signals. A digital comparator compares the digital signals and provides a digital trim signal, which is used to adjust the current to be trimmed until the digital measurement signal is equal to the digital reference signal within an acceptable tolerance. Gain and offset errors in the ADC cancel and do not affect the calibration of the trim operation.

    Abstract translation: 在IC中修整电流源的方法包括从外部电源导出参考电压，以及跨接在待修整电流上的外部参考电阻产生测量电压。 片上ADC用于提供相应的数字参考和数字测量信号。 数字比较器比较数字信号并提供数字微调信号，用于调整待修整的电流，直到数字测量信号等于可接受公差内的数字参考信号。 ADC中的增益和偏移误差取消，不影响校正操作的校准。

    CURRENT DETECTION CIRCUIT WITH OVER-CURRENT PROTECTION
    37.
    发明申请
    CURRENT DETECTION CIRCUIT WITH OVER-CURRENT PROTECTION 有权
    具有过流保护的电流检测电路

    公开(公告)号：US20160109489A1

    公开(公告)日：2016-04-21

    申请号：US14516555

    申请日：2014-10-16

    Applicant: Siddhartha Gopal Krishna ,  Ramji Gupta

    Inventor： Siddhartha Gopal Krishna ,  Ramji Gupta

    IPC: G01R19/00

    CPC classification number: G01R19/16571 ,  B60R21/01 ,  B60R2021/01068

    Abstract: Threshold detection for load current on a bus involves generating an output current representative of the load current using a transconductance circuit, sampling the output current during a quiescent phase of the bus to produce a sample current, generating a compensation current that is proportional to the transconductance gain associated with the transconductance circuit, where the compensation current is a function of the sample current, combining the output current, the sample current, the compensation current, and a reference current representative of a threshold value for the load current to produce a combined current, and using a discriminator during an active phase of the bus to output a first value when the sum current exceeds the threshold value and a second value when the combined current is less than the threshold value.

    Abstract translation: 总线上负载电流的阈值检测包括使用跨导电路产生代表负载电流的输出电流，在总线的静止阶段对输出电流进行采样以产生采样电流，产生与跨导成比例的补偿电流 与跨导电路相关联的增益，其中补偿电流是采样电流的函数，组合输出电流，采样电流，补偿电流和代表负载电流的阈值的参考电流以产生组合电流 并且当总和电流超过阈值时，在总线的有效相位期间使用鉴别器输出第一值，当组合电流小于阈值时，输出第二值。

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