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    Sensing circuit with regulated reference voltage
    2.
    发明公开
    Sensing circuit with regulated reference voltage 有权
    Abfühlschaltungmit regulierter Referenzsponung

    公开(公告)号：EP1566809A1

    公开(公告)日：2005-08-24

    申请号：EP04290449.0

    申请日：2004-02-19

    Applicant: STMicroelectronics S.r.l. ,  STMicroelectronics S.A.

    Inventor： Demange, Nicolas ,  Conte, Antonino ,  Preciso, Salvatore ,  Signorello, Alfredo

    IPC: G11C7/14 ,  G11C7/10

    CPC classification number: G11C7/062 ,  G11C7/14 ,  G11C16/28

    Abstract: A sensing circuit (120) for sensing currents, including at least one sense amplifier (122), comprising: a measure circuit branch (132i), having a measure node for receiving an input current (Ic) to be sensed, for converting the input current into a corresponding input voltage (V-); at least one comparison circuit branch (132o), having a comparison node for receiving a comparison current (Igs), for converting the comparison current into a corresponding comparison voltage (V+); and at least one voltage comparator (140) for comparing the input and comparison voltages, and means (N3s,135; N3s,135';N3s,135" ) for generating the comparison current based on a reference current (Ir), said means comprising: at least one voltage generator (135;135';135'') for receiving the reference current and for generating a corresponding sense amplifier biasing voltage (Vsab); and means (N3s) for converting the sense amplifier biasing voltage into the comparison current. The at least one voltage generator includes a first circuit branch (232i), having a first node for receiving the reference current, for converting the reference current into a corresponding reference voltage (Vref), a second circuit branch (232o), having a second node for receiving a regulation current (Ii), in current mirror configuration with the first circuit branch for mirroring a current (Img) corresponding to the reference current, the second circuit branch generating by conversion a non-regulated voltage (Vgen) corresponding to the mirrored current and to the regulation current, and voltage regulator means (N3g,240) receiving the reference voltage and the non-regulated voltage for regulating the sense amplifier biasing voltage by controlling the non-regulated voltage through the regulation current.

    Abstract translation: 一种用于感测电流的感测电路（120），包括至少一个读出放大器（122），包括：测量电路分支（132i），具有用于接收待感测的输入电流（Ic）的测量节点，用于转换输入 电流进入相应的输入电压（V-）; 至少一个比较电路分支（132o），具有用于接收比较电流（Igs）的比较节点，用于将比较电流转换成对应的比较电压（V +）; 和用于比较输入和比较电压的至少一个电压比较器（140）和用于基于参考电流（Ir）产生比较电流的装置（N3s，135; N3s，135'; N3s，135“）， 包括：用于接收所述参考电流并用于产生相应的读出放大器偏置电压（Vsab）的至少一个电压发生器（135; 135'; 135“）;以及用于将所述读出放大器偏置电压转换成比较的装置（N3s） 所述至少一个电压发生器包括第一电路分支（232i），其具有用于接收所述参考电流的第一节点，用于将所述参考电流转换为对应的参考电压（Vref）;第二电路分支（232o），具有 用于以电流镜配置接收调节电流（Ii）的第二节点，其中第一电路支路用于镜像对应于参考电流的电流（Img），第二电路支路通过转换产生非调节电压（ Vgen）和调节电流相对应的电压调节器装置（N3g，240）以及通过调节电流控制非调节电压来调节读出放大器偏置电压的非调节电压 。

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