公开(公告)号：US08292185B2

公开(公告)日：2012-10-23

申请号：US11259974

申请日：2005-10-26

Applicant: Kian-Ann Ng

Inventor： Kian-Ann Ng

IPC: G06K13/00

CPC classification number: G06K19/0723 ,  G06K19/0701

Abstract: A circuit includes an antenna terminal for generating a current through electromagnetic induction. The circuit also includes a rectifier for receiving the current and generating a rectified power supply voltage. In addition, the circuit includes a voltage clamp for sinking at least some of the current from the antenna terminal based on the rectified power supply voltage from the rectifier. The voltage clamp could include a control circuit (such as an N-channel transistor and a resistor) for controlling the sinking of at least some of the current from the antenna terminal. The voltage clamp could also include a sink circuit (such as an N-channel transistor) for sinking at least some of the current from the antenna terminal. The voltage clamp could further include a sink control circuit (such as a P-channel transistor and a resistor) for activating and deactivating the sink circuit based on operation of the control circuit.

Abstract translation: 电路包括用于通过电磁感应产生电流的天线端子。 电路还包括用于接收电流并产生整流电源电压的整流器。 此外，该电路包括用于从整流器基于经整流的电源电压从天线端子吸收至少一些电流的电压钳。 电压钳可以包括用于控制来自天线端子的至少一些电流的吸收的控制电路（例如N沟道晶体管和电阻器）。 电压钳还可以包括用于从天线端子吸收至少一些电流的汇流电路（例如N沟道晶体管）。 电压钳还可以包括用于基于控制电路的操作激活和去激活吸收电路的吸收器控制电路（例如P沟道晶体管和电阻器）。

公开(公告)号：US07372291B2

公开(公告)日：2008-05-13

申请号：US11259851

申请日：2005-10-26

Applicant: Kian-Ann Ng

Inventor： Kian-Ann Ng

IPC: H03K17/16 ,  H03K19/003 ,  H03K19/0175

CPC classification number: H03K19/018571 ,  H03K5/08

Abstract: A slew rate control circuit includes a receiver for receiving input signals and an output generator for generating output signals based on the input signals. The slew rate control circuit also includes an electrical interconnection coupling an output of the receiver and an input of the output generator. In addition, the slew rate control circuit includes a voltage clamp for clamping a voltage on the electrical interconnection between two known voltage reference levels. The voltage clamp may include a first current source for providing driving capacity to a driver circuit to prevent the voltage on the electrical interconnection from falling below one known voltage reference level. The voltage clamp may also include a second current source and a third current source for providing sinking capacity to the driver circuit to prevent the voltage on the electrical interconnection from rising above the other known voltage reference level.

Abstract translation: 压摆率控制电路包括用于接收输入信号的接收器和用于基于输入信号产生输出信号的输出发生器。 压摆率控制电路还包括将接收器的输出和输出发生器的输入耦合的电互连。 此外，转换速率控制电路包括用于钳位两个已知电压参考电平之间的电互连上的电压的电压钳位。 电压钳可以包括用于向驱动器电路提供驱动能力以防止电互连上的电压低于一个已知电压参考电平的第一电流源。 电压钳还可以包括第二电流源和第三电流源，用于向驱动器电路提供吸收能力，以防止电互连上的电压升高到高于另一已知电压参考电平。

公开(公告)号：US20070075744A1

公开(公告)日：2007-04-05

申请号：US11259851

申请日：2005-10-26

Applicant: Kian-Ann Ng

Inventor： Kian-Ann Ng

IPC: H03K19/094

CPC classification number: H03K19/018571 ,  H03K5/08

Abstract: A slew rate control circuit includes a receiver for receiving input signals and an output generator for generating output signals based on the input signals. The slew rate control circuit also includes an electrical interconnection coupling an output of the receiver and an input of the output generator. In addition, the slew rate control circuit includes a voltage clamp for clamping a voltage on the electrical interconnection between two known voltage reference levels. The voltage clamp may include a first current source for providing driving capacity to a driver circuit to prevent the voltage on the electrical interconnection from falling below one known voltage reference level. The voltage clamp may also include a second current source and a third current source for providing sinking capacity to the driver circuit to prevent the voltage on the electrical interconnection from rising above the other known voltage reference level.

Abstract translation: 压摆率控制电路包括用于接收输入信号的接收器和用于基于输入信号产生输出信号的输出发生器。 压摆率控制电路还包括将接收器的输出和输出发生器的输入耦合的电互连。 此外，转换速率控制电路包括用于钳位两个已知电压参考电平之间的电互连上的电压的电压钳位。 电压钳可以包括用于向驱动器电路提供驱动能力以防止电互连上的电压低于一个已知电压参考电平的第一电流源。 电压钳还可以包括第二电流源和第三电流源，用于向驱动器电路提供吸收能力，以防止电互连上的电压升高到另一已知电压参考电平以上。

公开(公告)号：US20070075147A1

公开(公告)日：2007-04-05

申请号：US11259974

申请日：2005-10-26

Applicant: Kian-Ann Ng

Inventor： Kian-Ann Ng

IPC: G06K19/06 ,  G06K7/08

CPC classification number: G06K19/0723 ,  G06K19/0701

Abstract: A circuit includes an antenna terminal for generating a current through electromagnetic induction. The circuit also includes a rectifier for receiving the current and generating a rectified power supply voltage. In addition, the circuit includes a voltage clamp for sinking at least some of the current from the antenna terminal based on the rectified power supply voltage from the rectifier. The voltage clamp could include a control circuit (such as an N-channel transistor and a resistor) for controlling the sinking of at least some of the current from the antenna terminal. The voltage clamp could also include a sink circuit (such as an N-channel transistor) for sinking at least some of the current from the antenna terminal. The voltage clamp could further include a sink control circuit (such as a P-channel transistor and a resistor) for activating and deactivating the sink circuit based on operation of the control circuit.

Abstract translation: 电路包括用于通过电磁感应产生电流的天线端子。 电路还包括用于接收电流并产生整流电源电压的整流器。 此外，电路包括用于从整流器基于整流的电源电压从天线端子吸收至少一些电流的电压钳。 电压钳可以包括用于控制来自天线端子的至少一些电流的吸收的控制电路（例如N沟道晶体管和电阻器）。 电压钳还可以包括用于从天线端子吸收至少一些电流的汇流电路（例如N沟道晶体管）。 电压钳还可以包括用于基于控制电路的操作来激活和去激活吸收电路的吸收器控制电路（例如P沟道晶体管和电阻器）。