公开(公告)号：US07362080B2

公开(公告)日：2008-04-22

申请号：US11207698

申请日：2005-08-20

申请人： Il-Young Sohn ,  Dong-Jin Keum

发明人： Il-Young Sohn ,  Dong-Jin Keum

IPC分类号： G05F1/573

CPC分类号： G05F1/573

摘要： A power regulator includes a pass transistor, a feedback circuit, an error amplifier and a protection circuit. The pass transistor receives an unregulated first power supply voltage, and an output terminal of the power regulator outputs an output voltage varying depending upon a control signal. The feedback circuit senses a current flowing through the pass transistor and generates a feedback signal. The error amplifier compares a reference signal to the feedback signal and generates a control signal varying depending upon a voltage difference between the reference signal and the feedback signal. The protection circuit scales down a current flowing through the pass transistor by a prescribed ratio and changes a voltage of the control signal when the scaled-down current has a value higher than a prescribed value. Accordingly, the power regulator may control a current limit correctly and be capable of implementing a sensing resistor having an appropriate resistance value for providing over-current protection that occupies a smaller chip area.

摘要翻译： 功率调节器包括传输晶体管，反馈电路，误差放大器和保护电路。 传输晶体管接收未调节的第一电源电压，并且功率调节器的输出端子输出根据控制信号而变化的输出电压。 反馈电路感测流过传输晶体管的电流并产生反馈信号。 误差放大器将参考信号与反馈信号进行比较，并产生根据参考信号和反馈信号之间的电压差而变化的控制信号。 保护电路按照规定的比例缩小流过通过晶体管的电流，并且当按比例缩小的电流具有高于规定值的值时，改变控制信号的电压。 因此，功率调节器可以正确地控制电流限制，并且能够实现具有适当电阻值的感测电阻器，以提供占用较小芯片面积的过电流保护。

公开(公告)号：US20060043945A1

公开(公告)日：2006-03-02

申请号：US11207698

申请日：2005-08-20

申请人： Il-Young Sohn ,  Dong-Jin Keum

发明人： Il-Young Sohn ,  Dong-Jin Keum

IPC分类号： G05F1/56

CPC分类号： G05F1/573

摘要： A power regulator includes a pass transistor, a feedback circuit, an error amplifier and a protection circuit. The pass transistor receives an unregulated first power supply voltage, and an output terminal of the power regulator outputs an output voltage varying depending upon a control signal. The feedback circuit senses a current flowing through the pass transistor and generates a feedback signal. The error amplifier compares a reference signal to the feedback signal and generates a control signal varying depending upon a voltage difference between the reference signal and the feedback signal. The protection circuit scales down a current flowing through the pass transistor by a prescribed ratio and changes a voltage of the control signal when the scaled-down current has a value higher than a prescribed value. Accordingly, the power regulator may control a current limit correctly and be capable of implementing a sensing resistor having an appropriate resistance value for providing over-current protection that occupies a smaller chip area.

摘要翻译： 功率调节器包括传输晶体管，反馈电路，误差放大器和保护电路。 传输晶体管接收未调节的第一电源电压，并且功率调节器的输出端子输出根据控制信号而变化的输出电压。 反馈电路感测流过传输晶体管的电流并产生反馈信号。 误差放大器将参考信号与反馈信号进行比较，并产生根据参考信号和反馈信号之间的电压差而变化的控制信号。 保护电路按照规定的比例缩小流过通过晶体管的电流，并且当按比例缩小的电流具有高于规定值的值时，改变控制信号的电压。 因此，功率调节器可以正确地控制电流限制，并且能够实现具有适当电阻值的感测电阻器，以提供占用较小芯片面积的过电流保护。

公开(公告)号：US06365950B1

公开(公告)日：2002-04-02

申请号：US09320873

申请日：1999-05-27

申请人： Il-Young Sohn

发明人： Il-Young Sohn

IPC分类号： H04N718

CPC分类号： H04N5/361 ,  H01L27/14643

摘要： The present invention relates to a CMOS active pixel sensor which includes a compensation circuit capable of compensating a lowered pixel voltage output due to leakage current of a photodiode. The CMOS active pixel sensor having a light sensing unit for generating an output voltage when light is incident thereupon, the sensing unit having an amount of leakage current before the incidence of light. A reset unit resets the output voltage of the light sensing unit to an initial reset voltage in response to a reset signal. A sense transistor has a source, a drain coupled to a power source voltage, and a gate coupled to the output of the light sensing unit. A select transistor has a drain connected to a source of the sense transistor, and provides the voltage of the sense transistor to a bit line, in response to a select signal. A compensation unit supplies a voltage corresponding to the output voltage of the light sensing unit lowered by the leakage current.

摘要翻译： CMOS有源像素传感器技术领域本发明涉及一种CMOS有源像素传感器，其包括能够补偿由于光电二极管的漏电流而引起的像素电压降低的补偿电路。 CMOS有源像素传感器具有光检测单元，用于当光入射时产生输出电压，感测单元在光入射之前具有一定量的漏电流。 复位单元响应于复位信号将光感测单元的输出电压复位为初始复位电压。 感测晶体管具有源极，耦合到电源电压的漏极和耦合到光感测单元的输出的栅极。 选择晶体管具有连接到感测晶体管的源极的漏极，并且响应于选择信号将感测晶体管的电压提供给位线。 补偿单元提供与由泄漏电流降低的光感测单元的输出电压相对应的电压。

公开(公告)号：US07053947B2

公开(公告)日：2006-05-30

申请号：US10067153

申请日：2002-02-04

申请人： Il-Young Sohn

发明人： Il-Young Sohn

IPC分类号： H04N9/64 ,  H04N3/14 ,  H04N5/335 ,  H01L27/00

CPC分类号： H04N5/361 ,  H01L27/14643

摘要： The present invention relates to a CMOS active pixel sensor which includes a compensation circuit capable of compensating a lowered pixel voltage output due to leakage current of a photodiode. The CMOS active pixel sensor having a light sensing unit for generating an output voltage when light is incident thereupon, the sensing unit having an amount of leakage current before the incidence of light. A reset unit resets the output voltage of the light sensing unit to an initial reset voltage in response to a reset signal. A sense transistor has a source, a drain coupled to a power source voltage, and a gate coupled to the output of the light sensing unit. A select transistor has a drain connected to a source of the sense transistor, and provides the voltage of the sense transistor to a bit line, in response to a select signal. A compensation unit supplies a voltage corresponding to the output voltage of the light sensing unit lowered by the leakage current.

摘要翻译： CMOS有源像素传感器技术领域本发明涉及一种CMOS有源像素传感器，其包括能够补偿由于光电二极管的漏电流引起的降低的像素电压输出的补偿电路。 CMOS有源像素传感器具有光检测单元，用于当光入射时产生输出电压，感测单元在光入射之前具有一定量的漏电流。 复位单元响应于复位信号将光感测单元的输出电压复位为初始复位电压。 感测晶体管具有源极，耦合到电源电压的漏极和耦合到光感测单元的输出的栅极。 选择晶体管具有连接到感测晶体管的源极的漏极，并且响应于选择信号将感测晶体管的电压提供给位线。 补偿单元提供与由泄漏电流降低的光感测单元的输出电压相对应的电压。