公开(公告)号：US20120200307A1

公开(公告)日：2012-08-09

申请号：US13345504

申请日：2012-01-06

申请人： Andriy Maharyta ,  Viktor Kremin

发明人： Andriy Maharyta ,  Viktor Kremin

IPC分类号： G01R27/26

CPC分类号： G01R27/2605 ,  G06F3/044

摘要： A capacitive sensor may include a transmit electrode and a receive electrode capacitively coupled with the transmit electrode. A capacitance sensing circuit senses a capacitance between the transmit and receive electrodes by applying a signal to the transmit electrode and rectifying a signal induced at the receive electrode. A compensation circuit reduces the effect of a mutual and parasitic capacitances of the transmit and receive electrode pair by adding a compensation signal to the rectified signal.

摘要翻译： 电容传感器可以包括发射电极和与发射电极电容耦合的接收电极。 电容感测电路通过向发射电极施加信号并整流在接收电极处感应的信号来感测发射电极和接收电极之间的电容。 补偿电路通过向整流信号添加补偿信号来减小发射和接收电极对的相互和寄生电容的影响。

公开(公告)号：US08169238B1

公开(公告)日：2012-05-01

申请号：US12166228

申请日：2008-07-01

申请人： Andriy Maharyta ,  Viktor Kremin

发明人： Andriy Maharyta ,  Viktor Kremin

IPC分类号： H03C3/00

CPC分类号： H03K17/955 ,  G01D5/24 ,  G01R27/2605 ,  H03K2217/960725 ,  H03K2217/96074

摘要： A capacitance to frequency converter includes a switching capacitor circuit, a charge dissipation circuit, a comparator, and a signal generator. The switching capacitor circuit charges a sensing capacitor and transfers charge from the sensing capacitor to a circuit node of the charge dissipation circuit. The comparator is coupled to the charge dissipation circuit to compare a potential at the circuit node to a reference voltage. The signal generator is coupled to an output of the comparator and to the charge dissipation circuit. The signal generator is responsive to the output of the comparator to generate a signal fed back to control the charge dissipation circuit. A frequency of the signal is proportional to a capacitance of the sensing capacitor.

摘要翻译： 电容变频器包括开关电容器电路，电荷耗散电路，比较器和信号发生器。 开关电容器电路对感测电容器充电，并将电荷从感测电容器传送到电荷耗散电路的电路节点。 比较器耦合到电荷耗散电路以将电路节点处的电位与参考电压进行比较。 信号发生器耦合到比较器的输出端和电荷耗散电路。 信号发生器响应比较器的输出以产生反馈信号以控制电荷耗散电路。 信号的频率与感测电容器的电容成正比。

公开(公告)号：US20120043971A1

公开(公告)日：2012-02-23

申请号：US12395462

申请日：2009-02-27

申请人： Andriy Maharyta

发明人： Andriy Maharyta

IPC分类号： G01R27/26

CPC分类号： G01R17/00 ,  G01D5/24 ,  G01D5/241 ,  G01D5/2412 ,  G01D5/2417 ,  G01R27/2605 ,  G06F3/016 ,  G06F3/0414 ,  G06K9/0002 ,  H03K17/962

摘要： A capacitance measurement circuit for measuring self and mutual capacitances may include a first electrode capacitively coupled with a second electrode, a first plurality of switches coupled with the first electrode, and a second plurality of switches coupled with the second electrode, wherein, during a first operation stage, the first plurality of switches is configured to apply a first initial voltage to the first electrode and the second plurality of switches is configured to apply a second initial voltage to the second electrode, and wherein, during a second operation stage, the first plurality of switches is configured to connect the first electrode with a measurement circuit, and the second plurality of switches is configured to connect the second electrode with a constant voltage.

摘要翻译： 用于测量自身和互电容的电容测量电路可以包括与第二电极电容耦合的第一电极，与第一电极耦合的第一多个开关以及与第二电极耦合的第二多个开关，其中在第一电极 第一多个开关被配置为向第一电极施加第一初始电压，并且第二多个开关被配置为向第二电极施加第二初始电压，并且其中在第二操作阶段期间，第一 多个开关被配置为将第一电极与测量电路连接，并且第二多个开关被配置为将第二电极与恒定电压连接。

公开(公告)号：US08093914B2

公开(公告)日：2012-01-10

申请号：US12332980

申请日：2008-12-11

申请人： Andriy Maharyta ,  Viktor Kremin

发明人： Andriy Maharyta ,  Viktor Kremin

IPC分类号： G01R27/26

CPC分类号： G01R27/2605 ,  G06F3/044

摘要： A capacitive sensor may include a transmit electrode and a receive electrode capacitively coupled with the transmit electrode. A capacitance sensing circuit senses a capacitance between the transmit and receive electrodes by applying a signal to the transmit electrode and rectifying a current waveform induced at the receive electrode. A compensation circuit reduces the effect of a mutual and parasitic capacitances of the transmit and receive electrode pair by adding a compensation current to the rectified current.

摘要翻译： 电容传感器可以包括发射电极和与发射电极电容耦合的接收电极。 电容感测电路通过向发射电极施加信号并整流在接收电极处感应的电流波形来感测发射电极和接收电极之间的电容。 补偿电路通过向整流电流增加补偿电流来减少发射和接收电极对的相互和寄生电容的影响。