公开(公告)号：US20080048680A1

公开(公告)日：2008-02-28

申请号：US11928770

申请日：2007-10-30

申请人： Kirk HARGREAVES ,  Joseph REYNOLDS ,  David ELY ,  Julian HAINES

发明人： Kirk HARGREAVES ,  Joseph REYNOLDS ,  David ELY ,  Julian HAINES

IPC分类号： G01R27/26

CPC分类号： G01R27/2605

摘要： Methods, systems and devices are described for detecting a measurable capacitance using sigma-delta measurement techniques. According to various embodiments, a voltage is applied to the measurable capacitance using a first switch. The measurable capacitance is allowed to share charge with a passive network. If the charge on the passive network is past a threshold value, then the charge on the passive network is changed by a known amount for a sufficient number of repetitions until the measurable capacitance can be detected. Such a detection scheme may be readily implemented using conventional components, and can be particularly useful in sensing the position of a finger, stylus or other object with respect to a button, slider, touchpad or other input sensor.

摘要翻译： 描述了使用Σ-Δ测量技术来检测可测量电容的方法，系统和装置。 根据各种实施例，使用第一开关将电压施加到可测量电容。 允许可测量电容与无源网络共享电荷。 如果无源网络上的电荷超过阈值，则无源网络上的电荷可以通过已知的量改变足够数量的重复，直到可以检测到可测量的电容。 这种检测方案可以使用常规部件容易地实现，并且可以特别有用于相对于按钮，滑块，触摸板或其他输入传感器感测手指，触针或其它物体的位置。

公开(公告)号：US20080042660A1

公开(公告)日：2008-02-21

申请号：US11925496

申请日：2007-10-26

申请人： David ELY ,  Paul ROUTLEY ,  Joseph REYNOLDS ,  Julian HAINES ,  Kirk HARGREAVES

发明人： David ELY ,  Paul ROUTLEY ,  Joseph REYNOLDS ,  Julian HAINES ,  Kirk HARGREAVES

IPC分类号： G01R27/26

CPC分类号： G01R27/2605 ,  G01D5/24 ,  G06F3/0383 ,  G06F3/044 ,  H03J9/00 ,  H03K17/955 ,  H03K17/962 ,  H03K17/9622 ,  H03K2217/960725 ,  H03K2217/960775

摘要： Methods, systems and devices are described for detecting a measurable capacitance using charge transfer techniques. According to various embodiments, a charge transfer process is performed for two or more times. During the charge transfer process, a pre-determined voltage is applied to the measurable capacitance, and the measurable capacitance is then allowed to share charge with a filter capacitance through a passive impedance that remains coupled to both the measurable capacitance and to the filter capacitance throughout the charge transfer process. The value of the measurable capacitance can then be determined as a function of a representation of a charge on the filter capacitance and the number of times that the charge transfer process was performed. Such a detection scheme may be readily implemented using conventional components, and can be particularly useful in sensing the position of a finger, stylus or other object with respect to an input sensor.

摘要翻译： 描述了使用电荷转移技术检测可测量电容的方法，系统和装置。 根据各种实施方式，电荷转移处理进行2次以上。 在电荷转移过程中，将预定电压施加到可测量电容，然后允许可测量的电容通过被动阻抗与滤波电容共享电荷，该被动阻抗保持与可测量的电容和整个滤波电容耦合 电荷转移过程。 可测量电容的值可以根据滤波电容上的电荷的表示和电荷转移过程的次数来确定。 这种检测方案可以使用常规部件容易地实现，并且可以特别有用于感测手指，触针或其他物体相对于输入传感器的位置。

公开(公告)号：US20080048679A1

公开(公告)日：2008-02-28

申请号：US11928702

申请日：2007-10-30

申请人： Kirk HARGREAVES ,  Joseph REYNOLDS ,  David ELY ,  Julian HAINES

发明人： Kirk HARGREAVES ,  Joseph REYNOLDS ,  David ELY ,  Julian HAINES

IPC分类号： G01R27/26

CPC分类号： G01R27/2605

摘要： Methods, systems and devices are described for detecting a measurable capacitance using sigma-delta measurement techniques. According to various embodiments, a voltage is applied to the measurable capacitance using a first switch. The measurable capacitance is allowed to share charge with a passive network. If the charge on the passive network is past a threshold value, then the charge on the passive network is changed by a known amount for a sufficient number of repetitions until the measurable capacitance can be detected. Such a detection scheme may be readily implemented using conventional components, and can be particularly useful in sensing the position of a finger, stylus or other object with respect to a button, slider, touchpad or other input sensor.

公开(公告)号：US20070159184A1

公开(公告)日：2007-07-12

申请号：US11615408

申请日：2006-12-22

申请人： Joseph REYNOLDS ,  Kirk HARGREAVES

发明人： Joseph REYNOLDS ,  Kirk HARGREAVES

IPC分类号： G01R27/26

CPC分类号： H03K17/955 ,  H03K17/9622

摘要： Methods and apparatus are provided for measuring a ratio of capacitances. The apparatus include a comparator including a comparator input, a comparator output, and a reference voltage; a first capacitive element including a first capacitance, a first electrode coupled to the comparator input, and a second electrode; a first biasing element coupled to the first electrode; a digitally-controlled voltage waveform generator for generating a varying waveform, the voltage waveform generator including a voltage waveform generator output coupled to the second electrode; a second capacitive element including a second capacitance and a third electrode coupled to the comparator input; and a controller coupled to the comparator output, the controller configured to control the digitally-controlled voltage waveform generator, wherein an output signal of the comparator is dependent on a ratio comprising the first capacitance and the second capacitance, and the first capacitive element and/or the second capacitive element has a variable capacitance.

摘要翻译： 提供了用于测量电容比的方法和装置。 该装置包括比较器，其包括比较器输入，比较器输出和参考电压; 第一电容元件，包括第一电容，耦合到所述比较器输入的第一电极和第二电极; 耦合到所述第一电极的第一偏置元件; 用于产生变化波形的数字控制电压波形发生器，所述电压波形发生器包括耦合到所述第二电极的电压波形发生器输出; 包括第二电容的第二电容元件和耦合到所述比较器输入的第三电极; 以及耦合到所述比较器输出的控制器，所述控制器被配置为控制所述数字控制的电压波形发生器，其中所述比较器的输出信号取决于包括所述第一电容和所述第二电容的比率，并且所述第一电容元件和/ 或者第二电容元件具有可变电容。

公开(公告)号：US20080042661A1

公开(公告)日：2008-02-21

申请号：US11926411

申请日：2007-10-29

申请人： Joseph REYNOLDS

发明人： Joseph REYNOLDS

IPC分类号： G01R27/26

CPC分类号： G01D5/24 ,  G01R27/2605 ,  H03K17/955 ,  H03K17/962 ,  H03K17/965 ,  H03K2017/9602 ,  H03K2217/96058 ,  H03K2217/960725 ,  H03K2217/960775

摘要： Methods, systems and devices are described for determining a measurable capacitance for proximity detection in a sensor having a plurality of sensing electrodes and at least one guarding electrode. A charge transfer process is executed for at least two executions. The charge transfer process includes applying a pre-determined voltage to at least one of the plurality of sensing electrodes using a first switch, applying a first guard voltage to the at least one guarding electrode using a second switch, sharing charge between the at least one of the plurality of sensing electrodes and a filter capacitance, and applying a second guard voltage different from the first guard voltage to the at least one guarding electrode. A voltage is measured on the filter capacitance for a number of measurements equal to at least one to produce at least one result to determine the measurable capacitance for proximity detection.

摘要翻译： 描述了用于确定具有多个感测电极和至少一个保护电极的传感器中的接近检测的可测量电容的方法，系统和装置。 对至少两次执行执行电荷转移处理。 电荷转移过程包括使用第一开关向多个感测电极中的至少一个施加预定电压，使用第二开关向至少一个保护电极施加第一保护电压，在至少一个保护电极之间共享电荷 的多个感测电极和滤波电容，并且将不同于第一保护电压的第二保护电压施加到至少一个保护电极。 在滤波电容上测量等于至少一个的测量值，以产生至少一个结果，以确定接近检测的可测量电容。

公开(公告)号：US20070268026A1

公开(公告)日：2007-11-22

申请号：US11833828

申请日：2007-08-03

申请人： Joseph REYNOLDS

发明人： Joseph REYNOLDS

IPC分类号： G01R27/26

CPC分类号： G01D5/24 ,  G01R27/2605 ,  H03K17/955 ,  H03K17/962 ,  H03K17/965 ,  H03K2017/9602 ,  H03K2217/96058 ,  H03K2217/960725 ,  H03K2217/960775

摘要： Methods, systems and devices are described for determining a measurable capacitance for proximity detection in a sensor having a plurality of sensing electrodes and at least one guarding electrode. A charge transfer process is executed for at least two executions. The charge transfer process includes applying a pre-determined voltage to at least one of the plurality of sensing electrodes using a first switch, applying a first guard voltage to the at least one guarding electrode using a second switch, sharing charge between the at least one of the plurality of sensing electrodes and a filter capacitance, and applying a second guard voltage different from the first guard voltage to the at least one guarding electrode. A voltage is measured on the filter capacitance for a number of measurements equal to at least one to produce at least one result to determine the measurable capacitance for proximity detection.

摘要翻译： 描述了用于确定具有多个感测电极和至少一个保护电极的传感器中的接近检测的可测量电容的方法，系统和装置。 对至少两次执行执行电荷转移处理。 电荷转移过程包括使用第一开关向多个感测电极中的至少一个施加预定电压，使用第二开关向至少一个保护电极施加第一保护电压，在至少一个保护电极之间共享电荷 的多个感测电极和滤波电容，并且将不同于第一保护电压的第二保护电压施加到至少一个保护电极。 在滤波电容上测量等于至少一个的测量值，以产生至少一个结果，以确定接近检测的可测量电容。