利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

5 条记录 (耗时 0.023 秒)

    Self-test for 10/100 Mbit ethernet physical layer devices
    3.
    发明授权
    Self-test for 10/100 Mbit ethernet physical layer devices 有权
    对10/100 Mbit以太网物理层设备进行自检

    公开(公告)号：US06529480B1

    公开(公告)日：2003-03-04

    申请号：US09377649

    申请日：1999-08-19

    申请人： John Ainslie Stewart ,  Vijaya G. Ceekala

    发明人： John Ainslie Stewart ,  Vijaya G. Ceekala

    IPC分类号： G01R3108

    CPC分类号： H04L43/50

    摘要： An apparatus for and method of self-testing a data packet communications device are disclosed. The apparatus tests the analog and digital transmission and reception capabilities of the device by generating a bit sequence, which the communications device forms into a packet, transmits the packet, then receives the packet and removes the bit sequence. The apparatus then compares the received bit sequence with another bit sequence and generates an error signal if the sequences fail to correspond. The bit sequence is generated by a linear feedback shift register which generates a pseudo-random sequence. Another linear feedback shift register generates another pseudo-random sequence which is compared to the first sequence. In this manner functional self-testing can be performed without an external testing device.

    摘要翻译： 公开了一种用于自测试数据分组通信设备的装置和方法。 该设备通过生成通信设备形成分组的比特序列来测试设备的模拟和数字发送和接收能力，发送分组，然后接收分组并去除比特序列。 然后，该装置将接收到的比特序列与另一比特序列进行比较，并且如果序列不对应，则产生错误信号。 比特序列由生成伪随机序列的线性反馈移位寄存器生成。 另一个线性反馈移位寄存器产生与第一序列进行比较的另一个伪随机序列。 以这种方式，可以在没有外部测试装置的情况下执行功能自检。

    Band-gap reference circuit with averaged current mirror offsets and method
    4.
    发明授权
    Band-gap reference circuit with averaged current mirror offsets and method 有权
    带平均电流镜偏移和方法的带隙参考电路

    公开(公告)号：US06930537B1

    公开(公告)日：2005-08-16

    申请号：US10061939

    申请日：2002-02-01

    申请人： Vijaya G. Ceekala ,  James B. Wieser ,  Devnath Varadarajan ,  Laurence D. Lewicki ,  Jitendra Mohan

    发明人： Vijaya G. Ceekala ,  James B. Wieser ,  Devnath Varadarajan ,  Laurence D. Lewicki ,  Jitendra Mohan

    IPC分类号： G05F1/10 ,  G05F3/02 ,  G05F3/30

    CPC分类号： G05F3/30

    摘要： A band-gap reference circuit with averaged current mirror offsets is provided that includes a differential amplifier circuit, a low current transistor circuit, a high current transistor circuit, and a configuration circuit. The differential amplifier circuit includes a first input node operable to receive a first input signal, a second input node operable to receive a second input signal, and an output node operable to generate an output signal based on the input signal difference. The low current transistor circuit is coupled to the differential amplifier circuit and is operable to receive the output signal and to generate the first input signal based on the output signal. The high current transistor circuit is coupled to the differential amplifier circuit and is operable to receive the output signal and to generate the second input signal based on the output signal. The configuration circuit is coupled to the low current transistor circuit and to the high current transistor circuit. The configuration circuit is operable to configure the band-gap reference circuit for a plurality of states by switching a plurality of components between the low current transistor circuit and the high current transistor circuit at specified intervals.

    摘要翻译： 提供了具有平均电流镜偏移的带隙参考电路，其包括差分放大器电路，低电流晶体管电路，高电流晶体管电路和配置电路。 差分放大器电路包括可操作以接收第一输入信号的第一输入节点，可操作以接收第二输入信号的第二输入节点和可用于基于输入信号差产生输出信号的输出节点。 低电流晶体管电路耦合到差分放大器电路，并且可操作以接收输出信号并且基于输出信号产生第一输入信号。 高电流晶体管电路耦合到差分放大器电路并且可操作以接收输出信号并且基于输出信号产生第二输入信号。 配置电路耦合到低电流晶体管电路和高电流晶体管电路。 配置电路可操作以通过以指定的间隔切换低电流晶体管电路和高电流晶体管电路之间的多个分量来配置多个状态的带隙基准电路。

    Band-gap reference circuit with offset cancellation
    5.
    发明授权
    Band-gap reference circuit with offset cancellation 有权
    带偏移取消的带隙参考电路

    公开(公告)号：US06535054B1

    公开(公告)日：2003-03-18

    申请号：US10032107

    申请日：2001-12-20

    申请人： Vijaya G. Ceekala ,  Laurence Douglas Lewicki ,  James B. Wieser

    发明人： Vijaya G. Ceekala ,  Laurence Douglas Lewicki ,  James B. Wieser

    IPC分类号： G05F110

    CPC分类号： G05F3/30

    摘要： A band-gap reference circuit with offset cancellation is provided that includes a differential amplifier circuit. The differential amplifier circuit includes a first input node and a second input node. The first input node is operable to receive a first input signal. The second input node is operable to receive a second input signal. The band-gap reference circuit is operable to alternate between a first state and a second state based on a specified duty cycle. The first input node is an inverting node and the second input node is a non-inverting node in the first state, and the first input node is a non-inverting node and the second input node is an inverting node in the second state. The differential amplifier circuit is operable to generate an output signal based on a difference between the first and second input signals.

    摘要翻译： 提供具有偏移消除的带隙参考电路，其包括差分放大器电路。 差分放大器电路包括第一输入节点和第二输入节点。 第一输入节点可操作以接收第一输入信号。 第二输入节点可操作以接收第二输入信号。 带隙参考电路可操作以基于指定的占空比在第一状态和第二状态之间交替。 第一输入节点是反相节点，第二输入节点是处于第一状态的非反相节点，第一输入节点是非反相节点，第二输入节点是处于第二状态的反相节点。 差分放大器电路可操作以基于第一和第二输入信号之间的差产生输出信号。