公开(公告)号：US20100308781A1

公开(公告)日：2010-12-09

申请号：US12628220

申请日：2009-12-01

申请人： Shun-Hau Kao ,  Mao-Chuan Chien ,  Chih-Liang Huang

发明人： Shun-Hau Kao ,  Mao-Chuan Chien ,  Chih-Liang Huang

IPC分类号： G05F1/10

CPC分类号： G05F1/56 ,  Y10S323/901

摘要： A low dropout regulator includes an error amplifier, an N-type depletion MOSFET, a first switch, a second switch, a low-pass filter resistor, and a low-pass filter capacitor. By switching on both the first switch and the second switch, a voltage level of an output node at a negative input terminal of the error amplifier may be rapidly raised to be close to and lower than a voltage level of an input node at a gate of the N-type depletion MOSFET. Both the first switch and the second switch are then switched off immediately so that the voltage level of the output node is gradually raised to be equal to the voltage level of the input node through the low-pass filter resistor.

摘要翻译： 低压降稳压器包括误差放大器，N型耗尽MOSFET，第一开关，第二开关，低通滤波电阻器和低通滤波电容器。 通过接通第一开关和第二开关，误差放大器的负输入端处的输出节点的电压电平可以迅速升高到接近于和低于栅极处的输入节点的电压电平 N型耗尽MOSFET。 然后立即关闭第一开关和第二开关，使得输出节点的电压电平逐渐升高到等于通过低通滤波电阻器的输入节点的电压电平。

公开(公告)号：US08129965B2

公开(公告)日：2012-03-06

申请号：US12628220

申请日：2009-12-01

申请人： Shun-Hau Kao ,  Mao-Chuan Chien ,  Chih-Liang Huang

发明人： Shun-Hau Kao ,  Mao-Chuan Chien ,  Chih-Liang Huang

IPC分类号： G05F1/40 ,  H02M7/10

CPC分类号： G05F1/56 ,  Y10S323/901

摘要： A low dropout regulator includes an error amplifier, an N-type depletion MOSFET, a first switch, a second switch, a low-pass filter resistor, and a low-pass filter capacitor. By switching on both the first switch and the second switch, a voltage level of an output node at a negative input terminal of the error amplifier may be rapidly raised to be close to and lower than a voltage level of an input node at a gate of the N-type depletion MOSFET. Both the first switch and the second switch are then switched off immediately so that the voltage level of the output node is gradually raised to be equal to the voltage level of the input node through the low-pass filter resistor.

摘要翻译： 低压降稳压器包括误差放大器，N型耗尽MOSFET，第一开关，第二开关，低通滤波电阻器和低通滤波电容器。 通过接通第一开关和第二开关，误差放大器的负输入端处的输出节点的电压电平可以迅速升高到接近于和低于栅极处的输入节点的电压电平 N型耗尽MOSFET。 然后立即关闭第一开关和第二开关，使得输出节点的电压电平逐渐升高到等于通过低通滤波电阻器的输入节点的电压电平。

公开(公告)号：US07622902B1

公开(公告)日：2009-11-24

申请号：US12272719

申请日：2008-11-17

申请人： Shun-Hau Kao ,  Mao-Chuan Chien

发明人： Shun-Hau Kao ,  Mao-Chuan Chien

IPC分类号： G05F1/40

CPC分类号： G05F1/575

摘要： An LDO with over-current protection includes a first and a second P-type transistor, a sensing resistor, a comparator, and an error amplifier. The channel aspect ratio of the first P-type transistor is much higher than that of the second P-type transistor. The first P-type transistor generates output voltage source according to input voltage source and current control signal. The sensing resistor is coupled among the input voltage source, the second P-type transistor, and the comparator, providing a sensing voltage. The comparator generates a current limiting signal according to first reference voltage and the sensing voltage. When the current limiting signal enables the error amplifier, the error amplifier adjusts voltage of the current control signal according to second reference voltage and voltage divided from the output voltage source; when the current limiting signal disables the error amplifier, voltage of the current control signal is not adjusted.

摘要翻译： 具有过电流保护的LDO包括第一和第二P型晶体管，感测电阻器，比较器和误差放大器。 第一P型晶体管的沟道纵横比远高于第二P型晶体管的沟道纵横比。 第一个P型晶体管根据输入电压源和电流控制信号产生输出电压源。 感测电阻器耦合在输入电压源，第二P型晶体管和比较器之间，提供感测电压。 比较器根据第一参考电压和感测电压产生限流信号。 当限流信号使能误差放大器时，误差放大器根据从输出电压源划分的第二参考电压和电压来调节电流控制信号的电压; 当限流信号禁用误差放大器时，不调整电流控制信号的电压。

公开(公告)号：US07612549B1

公开(公告)日：2009-11-03

申请号：US12270843

申请日：2008-11-13

申请人： Shun-Hau Kao ,  Mao-Chuan Chien

发明人： Shun-Hau Kao ,  Mao-Chuan Chien

IPC分类号： G05F1/00

CPC分类号： G05F1/575

摘要： An LDO with fast current limit includes P-type transistor, an error amplifier, an adjustable reference voltage circuit for generating an adjustable reference voltage, and an N-type transistor. The P-type transistor includes a first end coupled to the input voltage source, a second end for outputting an output voltage source, and a control end for receiving a current control signal in order to control the current of the output voltage source. The error amplifier generates the current control signal according to the reference voltage and a voltage divided from the output voltage source. N-type transistor includes a first end coupled to the output end of the error amplifier, a second end coupled to the input voltage source, and a control end for receiving the adjustable reference voltage. When the N-type transistor is turned on, the voltage of the current control signal is clamped by the adjustable reference voltage.

摘要翻译： 具有快速电流限制的LDO包括P型晶体管，误差放大器，用于产生可调参考电压的可调参考电压电路和N型晶体管。 P型晶体管包括耦合到输入电压源的第一端，用于输出输出电压源的第二端和用于接收电流控制信号以控制输出电压源的电流的控制端。 误差放大器根据参考电压和从输出电压源划分的电压产生电流控制信号。 N型晶体管包括耦合到误差放大器的输出端的第一端，耦合到输入电压源的第二端和用于接收可调参考电压的控制端。 当N型晶体管导通时，电流控制信号的电压被可调参考电压钳位。

公开(公告)号：US07906945B2

公开(公告)日：2011-03-15

申请号：US12271939

申请日：2008-11-17

申请人： Shun-Hau Kao ,  Mao-Chuan Chien

发明人： Shun-Hau Kao ,  Mao-Chuan Chien

IPC分类号： G05F1/10 ,  H02M7/10

CPC分类号： G05F1/10 ,  H02M1/36 ,  H02M3/07 ,  Y10S323/901

摘要： A soft-start voltage circuit includes an operational amplifier, a first and a second capacitors, a first and a second switches, and a voltage level shifter. The operational amplifier includes a positive end, a negative end, and an output end coupled to the negative end of the operational amplifier for outputting the soft-start voltage. The voltage level shifter is coupled between the first capacitor and the positive end of the operational amplifier for shifting a level of the voltage on the first capacitor. The first switch is coupled between the first and the second capacitors for coupling the first and the second capacitors according to the clock. The second switch is coupled between the second capacitor and the negative end of the operational amplifier for coupling the second capacitor and the negative end of the operational amplifier according to the inverted clock.

摘要翻译： 软启动电压电路包括运算放大器，第一和第二电容器，第一和第二开关以及电压电平移位器。 运算放大器包括正端，负端和耦合到运算放大器的负端的输出端，用于输出软启动电压。 电压电平移位器耦合在第一电容器和运算放大器的正极之间，用于移位第一电容器上的电压电平。 第一开关耦合在第一和第二电容器之间，用于根据时钟耦合第一和第二电容器。 第二开关耦合在第二电容器和运算放大器的负端之间，用于根据反相时钟耦合第二电容器和运算放大器的负端。

公开(公告)号：US20100073071A1

公开(公告)日：2010-03-25

申请号：US12275228

申请日：2008-11-21

申请人： Mao-Chuan Chien ,  Shun-Hau Kao

发明人： Mao-Chuan Chien ,  Shun-Hau Kao

IPC分类号： H01L37/00

CPC分类号： G05D23/20 ,  G05D23/1909

摘要： An over-temperature detecting circuit includes a band-gap circuit for generating a temperature-drop-dependent voltage and a reference voltage not varying with the temperature, a transistor coupled to the band-gap circuit for generating a temperature-rise-dependent current according to the temperature-drop-dependent voltage, a resistor coupled to the transistor for generating a temperature-rise-dependent voltage according to the temperature-rise-dependent current, and a comparator coupled to the band-gap circuit and the resistor for generating a thermal shutdown signal according to the reference voltage and the temperature-rise-dependent voltage.

摘要翻译： 过温度检测电路包括用于产生温度依赖电压和不随温度变化的参考电压的带隙电路，耦合到带隙电路的晶体管，用于产生与温度相关的电流， 耦合到所述晶体管的电阻器，用于根据所述基于温度升高的电流产生与温度升高相关的电压;以及比较器，其耦合到所述带隙电路和所述电阻器，用于产生 热关断信号根据参考电压和温升依赖电压。

公开(公告)号：US20100060248A1

公开(公告)日：2010-03-11

申请号：US12271939

申请日：2008-11-17

申请人： Shun-Hau Kao ,  Mao-Chuan Chien

发明人： Shun-Hau Kao ,  Mao-Chuan Chien

IPC分类号： G05F1/00

CPC分类号： G05F1/10 ,  H02M1/36 ,  H02M3/07 ,  Y10S323/901

摘要： A soft-start voltage circuit includes an operational amplifier, a first and a second capacitors, a first and a second switches, and a voltage level shifter. The operational amplifier includes a positive end, a negative end, and an output end coupled to the negative end of the operational amplifier for outputting the soft-start voltage. The voltage level shifter is coupled between the first capacitor and the positive end of the operational amplifier for shifting a level of the voltage on the first capacitor. The first switch is coupled between the first and the second capacitors for coupling the first and the second capacitors according to the clock. The second switch is coupled between the second capacitor and the negative end of the operational amplifier for coupling the second capacitor and the negative end of the operational amplifier according to the inverted clock.

摘要翻译： 软启动电压电路包括运算放大器，第一和第二电容器，第一和第二开关以及电压电平移位器。 运算放大器包括正端，负端和耦合到运算放大器的负端的输出端，用于输出软启动电压。 电压电平移位器耦合在第一电容器和运算放大器的正极之间，用于移位第一电容器上的电压电平。 第一开关耦合在第一和第二电容器之间，用于根据时钟耦合第一和第二电容器。 第二开关耦合在第二电容器和运算放大器的负端之间，用于根据反相时钟耦合第二电容器和运算放大器的负端。