公开(公告)号：EP2495877A3

公开(公告)日：2014-03-05

申请号：EP12157331.5

申请日：2012-02-28

申请人： NXP B.V.

发明人： Koellmann, Andreas ,  Rode, Steffen

IPC分类号： H03K19/0185

CPC分类号： H03K19/018507 ,  H03K19/018592

摘要： Level-shifting devices and methods allow signals to be passed between input/output (I/O) ports. One such device comprises a first output driver (108) that drives a first I/O port (122) in response to a first control signal (110 out). A second output driver (120) drives a second I/O port (102) in response to a second control signal (116 out). A first comparator circuit (110), responsive to a first reference voltage (Vref1) and a voltage at the first I/O port (122), generates the second control signal. A limiter circuit (106) limits driving of the first I/O port (122), by the first driver (108), to a limiting voltage (Vol) that responsive to a the first I/O port (122) over a first range of signaling voltages, and constrained to a set value over a second range. A voltage reference generating circuit (114) generates a second reference voltage (Vref2). A second comparator circuit (116) generates the first control signal in response to the second reference voltage and the second I/O port (102).

公开(公告)号：EP2495877A2

公开(公告)日：2012-09-05

申请号：EP12157331.5

申请日：2012-02-28

申请人： NXP B.V.

发明人： Koellmann, Andreas ,  Rode, Steffen

IPC分类号： H03K19/0185

CPC分类号： H03K19/018507 ,  H03K19/018592

摘要： Level-shifting devices and methods allow signals to be passed between input/output (I/O) ports. One such device comprises a first output driver (108) that drives a first I/O port (122) in response to a first control signal (110 out). A second output driver (120) drives a second I/O port (102) in response to a second control signal (116 out). A first comparator circuit (110), responsive to a first reference voltage (Vref1) and a voltage at the first I/O port (122), generates the second control signal. A limiter circuit (106) limits driving of the first I/O port (122), by the first driver (108), to a limiting voltage (Vol) that responsive to a the first I/O port (122) over a first range of signaling voltages, and constrained to a set value over a second range. A voltage reference generating circuit (114) generates a second reference voltage (Vref2). A second comparator circuit (116) generates the first control signal in response to the second reference voltage and the second I/O port (102).

摘要翻译： 电平转换器件和方法允许在输入/输出（I / O）端口之间传递信号。 一个这样的设备包括响应于第一控制信号（110输出）驱动第一I / O端口（122）的第一输出驱动器（108）。 响应于第二控制信号（116输出），第二输出驱动器（120）驱动第二I / O端口（102）。 响应于第一参考电压（Vref1）和第一I / O端口（122）处的电压的第一比较器电路（110）产生第二控制信号。 限制器电路（106）将第一驱动器（108）的第一I / O端口（122）的驱动限制为响应于第一I / O端口（122）的第一I / O端口（122）的限制电压（Vol） 信号电压的范围，并且在第二范围内被约束到设定值。 电压基准产生电路（114）产生第二参考电压（Vref2）。 第二比较器电路（116）响应于第二参考电压和第二I / O端口（102）产生第一控制信号。

公开(公告)号：EP2503690A3

公开(公告)日：2014-02-26

申请号：EP12159384.2

申请日：2012-03-14

申请人： NXP B.V.

发明人： Koellmann, Andreas

IPC分类号： H03K17/082 ,  H03K17/16 ,  H03K17/30 ,  H03K19/003

CPC分类号： H03K17/302

摘要： Methods, devices and circuits are provided for protection from backdrive current. One such device is subject to back voltage from an output node (output) of the device and includes circuitry (104,106) that is configured to compare the supply voltage node (VDD_IN) and the output node (output). In response to the comparison, the circuitry generates an output signal. Level shifted versions of the output signal are used to provide an output voltage corresponding to the higher of a supply voltage node and an output node. Switches (108,110) are used to place the device (112) in different modes in response to the output signal.

公开(公告)号：EP2503690A2

公开(公告)日：2012-09-26

申请号：EP12159384.2

申请日：2012-03-14

申请人： NXP B.V.

发明人： Koellmann, Andreas

IPC分类号： H03K17/082 ,  H03K17/16 ,  H03K19/003

CPC分类号： H03K17/302

摘要： Methods, devices and circuits are provided for protection from backdrive current. One such device is subject to back voltage from an output node (output) of the device and includes circuitry (104,106) that is configured to compare the supply voltage node (VDD_IN) and the output node (output). In response to the comparison, the circuitry generates an output signal. Level shifted versions of the output signal are used to provide an output voltage corresponding to the higher of a supply voltage node and an output node. Switches (108,110) are used to place the device (112) in different modes in response to the output signal.

摘要翻译： 提供了方法，装置和电路以防止反向驱动电流。 一个这样的设备经受来自设备的输出节点（输出）的反向电压，并且包括被配置为比较电源电压节点（VDD_IN）和输出节点（输出）的电路（104,106）。 响应于比较，电路产生输出信号。 输出信号的电平转换版本用于提供对应于电源电压节点和输出节点的较高者的输出电压。 开关（108,110）用于响应于输出信号将设备（112）放置在不同的模式中。