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    • 6. 发明授权
    • Semiconductor device having calibration circuit for adjusting output impedance of output buffer circuit
    • 具有用于调整输出缓冲电路的输出阻抗的校准电路的半导体器件
    • US08390318B2
    • 2013-03-05
    • US13401052
    • 2012-02-21
    • Hideyuki YokouTakanori EguchiManabu Ishimatsu
    • Hideyuki YokouTakanori EguchiManabu Ishimatsu
    • H03K17/16
    • G11C29/022G11C29/028
    • Disclosed herein is a device that includes a replica buffer circuit that drives a calibration terminal, a reference-potential generating circuit that generates a reference potential, a comparison circuit that compares a potential appearing at the calibration terminal with the reference potential, and a control circuit that changes an output impedance of the replica buffer circuit based on a result of a comparison by the comparison circuit. The reference-potential generating circuit includes a first potential generating unit activated in response to an enable signal and a second potential generating unit activated regardless of the enable signal, and an output node of the first potential generating unit and an output node of the second potential generating unit are commonly connected to the comparison circuit.
    • 本文公开了一种装置,其包括驱动校准端子的复制缓冲电路,产生参考电位的基准电位产生电路,将校准端子出现的电位与参考电位进行比较的比较电路和控制电路 其基于比较电路的比较结果来改变复制缓冲电路的输出阻抗。 参考电位产生电路包括响应于使能信号而被激活的第一电位产生单元和与使能信号无关地激活的第二电位产生单元,以及第一电位产生单元的输出节点和第二电位的输出节点 发电单元通常连接到比较电路。