公开(公告)号：US07843249B2

公开(公告)日：2010-11-30

申请号：US12186791

申请日：2008-08-06

申请人： Zhong Zhang ,  Jiantao Cheng ,  Ke Wu ,  Chaoqun Wu

发明人： Zhong Zhang ,  Jiantao Cheng ,  Ke Wu ,  Chaoqun Wu

IPC分类号： H03K17/945

CPC分类号： H03K17/962 ,  H03K2217/96073

摘要： An adaptive capacitive touch sense control circuit includes a voltage buffer, a current setting resistor, a current mirror, a capacitor, a start comparator, an end comparator and a time-to-digital converter. The capacitor is connected with the current setting resistor. The circuit further includes a latch with a first control switch and a second control switch. The current setting resistor is switched between the ground and a voltage source through a switching element, so that when the current setting resistor is grounded, the first control switch is closed and the second control switch is opened, and when the current setting resistor is connected with the voltage source, the second control switch is closed and the first control switch is opened. An adaptive charging mode is adopted to sense a capacitance variation with a great ability of interference recognition, a simple structure, low power consumption and real time processing.

摘要翻译： 自适应电容式触摸感测控制电路包括电压缓冲器，电流设定电阻器，电流镜，电容器，启动比较器，结束比较器和时间 - 数字转换器。 电容与电流设定电阻相连。 电路还包括具有第一控制开关和第二控制开关的锁存器。 电流设定电阻通过开关元件在接地和电压源之间切换，使得当电流设定电阻接地时，第一控制开关闭合，第二控制开关断开，当连接电流设定电阻时 利用电压源，第二控制开关闭合，第一控制开关打开。 采用自适应充电模式，以较高的干扰识别能力，简单的结构，低功耗和实时的处理能力来感测电容变化。

公开(公告)号：US20090108914A1

公开(公告)日：2009-04-30

申请号：US12186791

申请日：2008-08-06

申请人： Zhong Zhang ,  Jiantao Cheng ,  Ke Wu ,  Chaoqun Wu

发明人： Zhong Zhang ,  Jiantao Cheng ,  Ke Wu ,  Chaoqun Wu

IPC分类号： H03K17/96

CPC分类号： H03K17/962 ,  H03K2217/96073

摘要： An adaptive capacitive touch sense control circuit includes a voltage buffer, a current setting resistor, a current mirror, a capacitor, a start comparator, an end comparator and a time-to-digital converter. The capacitor is connected with the current setting resistor. The circuit further includes a latch with a first control switch and a second control switch. The current setting resistor is switched between the ground and a voltage source through a switching element, so that when the current setting resistor is grounded, the first control switch is closed and the second control switch is opened, and when the current setting resistor is connected with the voltage source, the second control switch is closed and the first control switch is opened. An adaptive charging mode is adopted to sense a capacitance variation with a great ability of interference recognition, a simple structure, low power consumption and real time processing.

摘要翻译： 自适应电容式触摸感测控制电路包括电压缓冲器，电流设定电阻器，电流镜，电容器，启动比较器，结束比较器和时间 - 数字转换器。 电容与电流设定电阻相连。 电路还包括具有第一控制开关和第二控制开关的锁存器。 电流设定电阻通过开关元件在接地和电压源之间切换，使得当电流设定电阻接地时，第一控制开关闭合，第二控制开关断开，当连接电流设定电阻时 利用电压源，第二控制开关闭合，第一控制开关打开。 采用自适应充电模式，以较高的干扰识别能力，简单的结构，低功耗和实时的处理能力来感测电容变化。