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    • 62. 发明授权
    • Semiconductor device and data processing system
    • 半导体器件和数据处理系统
    • US07774667B2
    • 2010-08-10
    • US12054366
    • 2008-03-24
    • Tatsuya SaitoKaname YamasakiIwao SuzukiTakeshi BingoKeiichi Horie
    • Tatsuya SaitoKaname YamasakiIwao SuzukiTakeshi BingoKeiichi Horie
    • G01R31/28
    • G11C29/16G11C29/1201G11C2029/3602
    • The test design cost of a circuit capable of accessing an external memory is reduced. There is included a built-in self-test circuit for use in testing an external memory separately from a memory controller for performing memory control in response to an access request to the external memory capable of being coupled to a memory interface, and a TAP controller is used to control the built-in self-test circuit and referring to a test result. There is adopted a multiplexer for switchably selecting the memory controller or the built-in self-test circuit as a circuit for coupling to the memory interface in accordance with control information externally inputted through the TAP controller. The built-in self-test circuit programmably generates and outputs a pattern for a memory test in accordance with an instruction inputted through the TAP controller, and compares data read from the external memory with an expected value.
    • 能够访问外部存储器的电路的测试设计成本降低。 包括内置自检电路,用于独立于存储器控制器测试外部存储器,用于响应于能够耦合到存储器接口的外部存储器的访问请求执行存储器控制,以及TAP控制器 用于控制内置自检电路并参考测试结果。 采用多路复用器,根据外部通过TAP控制器输入的控制信息,可选择存储控制器或内置自检电路作为耦合到存储器接口的电路。 内置的自检电路可编程地根据通过TAP控制器输入的指令产生和输出用于存储器测试的模式,并且将从外部存储器读取的数据与预期值进行比较。
    • 63. 发明授权
    • Amplifier circuit
    • 放大器电路
    • US07714644B2
    • 2010-05-11
    • US12166666
    • 2008-07-02
    • Takashi TakemotoHiroki YamashitaTatsuya Saito
    • Takashi TakemotoHiroki YamashitaTatsuya Saito
    • H03F1/02
    • H03F3/45475H03F1/26H03F1/34H03F3/45085H03F3/45183H03F3/45968H03F2200/372H03F2200/375H03F2203/45534
    • An amplifier circuit block and a compensation circuit block are provided. The amplifier circuit block includes an analog adder for subtracting an output signal of the compensation circuit block from an input signal and an amplifier circuit operating in a wide band. The compensation circuit block includes an amplifier circuit with a low offset voltage and a low noise in a low frequency region, an analog adder block for subtracting an output signal of the amplifier circuit from an output signal of the amplifier circuit and generating a differential signal thereof, and a feedback circuit block for negatively feeding back the differential signal to the analog adder. The amplifier circuit block can reduce the offset voltage and the low-band noise by the negative feedback of the differential signal, and at the same time, the operation band of the entire amplifier circuit can be decided by the characteristic of the amplifier circuit.
    • 提供放大器电路块和补偿电路块。 放大器电路块包括用于从输入信号中减去补偿电路块的输出信号的模拟加法器和在宽带中工作的放大器电路。 补偿电路块包括在低频区域具有低失调电压和低噪声的放大器电路,用于从放大器电路的输出信号中减去放大器电路的输出信号并产生其差分信号的模拟加法器块 以及用于将差分信号负反馈给模拟加法器的反馈电路块。 放大器电路块可以通过差分信号的负反馈来减小偏移电压和低带噪声,同时整个放大器电路的工作频带可以由放大器电路的特性决定。
    • 69. 发明授权
    • Clock extracting fabric in a communication device
    • 在通信设备中的时钟提取结构
    • US07277643B2
    • 2007-10-02
    • US10629755
    • 2003-07-30
    • Takashige BabaTatsuya SaitoMasayoshi YagyuShigeo Oomae
    • Takashige BabaTatsuya SaitoMasayoshi YagyuShigeo Oomae
    • H04B10/00H04L27/00H04L12/50H04J3/06
    • H04L25/14H04L7/033
    • A signal communication apparatus of a clock reproduction system in which clock signals are extracted from each of parallel data signals for redigitizing each of the data signals. The apparatus includes a reference clock signal generating circuit which is comprised of a clock extraction circuit for extracting a clock signal from each of a plurality of bits of received data signals, and a clock signal selection circuit for selecting one of the extracted clock signals. Alternatively, the reference clock signal generating circuit may be comprised of a data signal selection circuit for selecting one of a plurality of received data signals, and a clock extraction circuit for extracting a clock signal from the selected bit. Based on the resultant reference clock signal, clock signals are obtained that are phase-adjusted for redigitizing each bit of the received data signals. The selection made in the selection circuit is switched on the basis of the output of a clock signal monitoring circuit that detects the occurrence of abnormalities in the frequency of the extracted clock signal. Thus, the extraction of clock can be continued using other bits in the event of an abnormality in the bit from which the clock is being extracted.
    • 一种时钟再现系统的信号通信装置,其中从每个并行数据信号中提取时钟信号,以对每个数据信号进行重新排序。 该装置包括一个参考时钟信号产生电路,它包括一个时钟提取电路,用于从接收的数据信号的多个比特中提取一个时钟信号;以及时钟信号选择电路,用于选择所提取的时钟信号之一。 或者,参考时钟信号发生电路可以包括用于选择多个接收数据信号中的一个的数据信号选择电路和用于从所选位提取时钟信号的时钟提取电路。 基于所得到的参考时钟信号,获得相位调整的时钟信号,以对接收到的数据信号的每一位进行重新编码。 在选择电路中进行的选择是基于检测提取的时钟信号的频率异常的发生的时钟信号监视电路的输出而被切换的。 因此,在提取时钟的位的异常的情况下,可以使用其他位继续提取时钟。