会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 8. 发明授权
    • Photocurrent sensing circuit having stabilized feedback loop
    • 光电流检测电路具有稳定的反馈回路
    • US07129463B2
    • 2006-10-31
    • US10968535
    • 2004-10-19
    • Deok-Young Jung
    • Deok-Young Jung
    • H03F3/08
    • H01L31/02019H03F3/082
    • A photocurrent sensing circuit having a stabilized feedback loop comprises a photocurrent generator including a photodiode generating the photocurrent in proportion to an amount of incident light and applying the photocurrent to an output node, a switching unit applying the photocurrent applied to a control node to a voltage-generating capacitor when a shutter signal is in a first state, and applying a predetermined current to the control node when the shutter signal is in a second state, and a circuit stabilizer applying the photocurrent applied to the output node to the control node, and always forming a feedback loop of the photodiode through the photocurrent applied to the output node, wherein the circuit stabilizer comprises a first NMOS transistor forming the feedback loop of the photodiode in response to the photocurrent input to the output node when the predetermined current is applied to the control node, breaking the feedback loop and applying the photocurrent applied to the output node to the control node when the predetermined current is not applied to the control node, a second NMOS transistor always forming the feedback loop of the photodiode in response to the photocurrent applied to the output node, and a third NMOS transistor connected to the first and second transistors and the photodiode, and providing a current path for forming the feedback loop.
    • 具有稳定的反馈回路的光电流检测电路包括光电流发生器,其包括光电二极管,其产生与入射光量成比例的光电流并将光电流施加到输出节点;开关单元,将施加到控制节点的光电流施加到电压 当快门信号处于第一状态时,产生电容器,并且当快门信号处于第二状态时将预定电流施加到控制节点;以及电路稳压器,将施加到输出节点的光电流施加到控制节点,以及 总是通过施加到输出节点的光电流形成光电二极管的反馈回路,其中电路稳压器包括第一NMOS晶体管,当预定电流被施加到第一NMOS晶体管时,该第一NMOS晶体管响应于光电流输入到输出节点,形成光电二极管的反馈回路 控制节点,断开反馈回路并施加光电流 当所述预定电流不被施加到所述控制节点时,输出节点到所述控制节点;响应于施加到所述输出节点的光电流总是形成所述光电二极管的反馈回路的第二NMOS晶体管,以及连接到所述第一NMOS晶体管的第三NMOS晶体管 以及第二晶体管和光电二极管,并提供用于形成反馈回路的电流路径。