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公开(公告)号：US08760133B2
公开(公告)日：2014-06-24
申请号：US12255356
申请日：2008-10-21
申请人： Morihito Hasegawa , Hidenobu Ito , Kwok Fai Hui , Yat Fong Yung
发明人： Morihito Hasegawa , Hidenobu Ito , Kwok Fai Hui , Yat Fong Yung
IPC分类号： G05F1/40
CPC分类号： G05F1/575
摘要： According to one aspect of the embodiment, a linear regulator circuit includes an output transistor outputting an output current based on a input voltage, an error amplifier outputting a control signal based on an electric potential difference between an output voltage based on the output current and a reference voltage, a buffer circuit coupled between the error amplifier and the output transistor, and a drive capability adjustment circuit adjusting a load drive capability of the buffer circuit in synchronization with the output current.
摘要翻译： 根据本实施例的一个方面，线性调节器电路包括输出晶体管，其基于输入电压输出输出电流;误差放大器，基于输出电流的输出电压和基于输出电流的电位差输出控制信号; 参考电压，耦合在误差放大器和输出晶体管之间的缓冲电路，以及与输出电流同步地调节缓冲电路的负载驱动能力的驱动能力调整电路。
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2.发明申请公开(公告)号：US20090115382A1
公开(公告)日：2009-05-07
申请号：US12255356
申请日：2008-10-21
申请人： Morihito HASEGAWA , Hidenobu Ito , Kwok Fai Hui , Yat Fong Yung
发明人： Morihito HASEGAWA , Hidenobu Ito , Kwok Fai Hui , Yat Fong Yung
IPC分类号： G05F1/00
CPC分类号： G05F1/575
摘要： According to one aspect of the embodiment, a linear regulator circuit includes an output transistor outputting an output current based on a input voltage, an error amplifier outputting a control signal based on an electric potential difference between an output voltage based on the output current and a reference voltage, a buffer circuit coupled between the error amplifier and the output transistor, and a drive capability adjustment circuit adjusting a load drive capability of the buffer circuit in synchronization with the output current.
摘要翻译： 根据本实施例的一个方面，线性调节器电路包括输出晶体管，其基于输入电压输出输出电流;误差放大器，基于输出电流的输出电压和基于输出电流的电位差输出控制信号; 参考电压，耦合在误差放大器和输出晶体管之间的缓冲电路，以及与输出电流同步地调节缓冲电路的负载驱动能力的驱动能力调整电路。
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3.发明申请POWER SUPPLY CIRCUIT, OVERCURRENT PROTECTION CIRCUIT FOR THE SAME, AND ELECTRONIC DEVICE 有权电源电路，相同的过电流保护电路和电子设备公开(公告)号：US20090201618A1
公开(公告)日：2009-08-13
申请号：US12369907
申请日：2009-02-12
IPC分类号： H02H9/08
CPC分类号： G05F1/573 , H03K17/0822
摘要： A power supply circuit includes an output transistor including a source coupled to power supply voltage, and a drain from which output voltage is outputted; a first error amplifier powered by the power supply voltage and outputting a signal based on a potential difference between the output voltage and a reference voltage; a buffer transistor including a gate coupled to the output of the first error amplifier, and a source coupled via a constant current source to the power supply voltage and coupled to a gate of the output transistor; a current detection transistor coupled to the output transistor such that a gate and source are shared; and an overcurrent protection circuit configured to limit the drain current of the buffer transistor based on the increase of the drain current of the current detection transistor and thereby control the output current of the output transistor.
摘要翻译： 电源电路包括：输出晶体管，其包括耦合到电源电压的源极和从其输出输出电压的漏极; 由所述电源电压供电的第一误差放大器，并且基于所述输出电压和参考电压之间的电位差输出信号; 缓冲晶体管，其包括耦合到所述第一误差放大器的输出的栅极，以及经由恒定电流源耦合到所述电源电压并耦合到所述输出晶体管的栅极的源极; 耦合到输出晶体管的电流检测晶体管，使得门和源被共享; 以及过电流保护电路，其被配置为基于电流检测晶体管的漏极电流的增加来限制缓冲晶体管的漏极电流，从而控制输出晶体管的输出电流。
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公开(公告)号：US08203817B2
公开(公告)日：2012-06-19
申请号：US12369907
申请日：2009-02-12
IPC分类号： H02H9/08
摘要： A power supply circuit includes an output transistor including a source coupled to power supply voltage, and a drain from which output voltage is outputted; a first error amplifier powered by the power supply voltage and outputting a signal based on a potential difference between the output voltage and a reference voltage; a buffer transistor including a gate coupled to the output of the first error amplifier, and a source coupled via a constant current source to the power supply voltage and coupled to a gate of the output transistor; a current detection transistor coupled to the output transistor such that a gate and source are shared; and an overcurrent protection circuit configured to limit the drain current of the buffer transistor based on the increase of the drain current of the current detection transistor and thereby control the output current of the output transistor.
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5.发明授权Power supply circuit, overcurrent protection circuit for the same, and electronic device 有权电源电路，过流保护电路相同，电子设备公开(公告)号：US08233257B2
公开(公告)日：2012-07-31
申请号：US12369907
申请日：2009-02-12
IPC分类号： H02H9/08
CPC分类号： G05F1/573 , H03K17/0822
摘要： A power supply circuit includes an output transistor including a source coupled to power supply voltage, and a drain from which output voltage is outputted; a first error amplifier powered by the power supply voltage and outputting a signal based on a potential difference between the output voltage and a reference voltage; a buffer transistor including a gate coupled to the output of the first error amplifier, and a source coupled via a constant current source to the power supply voltage and coupled to a gate of the output transistor; a current detection transistor coupled to the output transistor such that a gate and source are shared; and an overcurrent protection circuit configured to limit the drain current of the buffer transistor based on the increase of the drain current of the current detection transistor and thereby control the output current of the output transistor.
摘要翻译： 电源电路包括：输出晶体管，其包括耦合到电源电压的源极和从其输出输出电压的漏极; 由所述电源电压供电的第一误差放大器，并且基于所述输出电压和参考电压之间的电位差输出信号; 缓冲晶体管，其包括耦合到所述第一误差放大器的输出的栅极，以及经由恒定电流源耦合到所述电源电压并耦合到所述输出晶体管的栅极的源极; 耦合到输出晶体管的电流检测晶体管，使得门和源被共享; 以及过电流保护电路，其被配置为基于电流检测晶体管的漏极电流的增加来限制缓冲晶体管的漏极电流，从而控制输出晶体管的输出电流。
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