公开(公告)号：US5552648A

公开(公告)日：1996-09-03

申请号：US199929

申请日：1994-02-22

Applicant: Thomas D. Cook ,  Eugene R. Bukowski Jr. ,  Vicki J. Voorhis

Inventor： Thomas D. Cook ,  Eugene R. Bukowski Jr. ,  Vicki J. Voorhis

IPC: G06G7/625 ,  H02M3/07 ,  H02M3/06

CPC classification number: G06G7/625 ,  H02M3/07 ,  Y10T307/74 ,  Y10T307/826

Abstract: A switched capacitor (12) providing an effective resistance having a relatively long time constant. The switched capacitor (12) includes a technique for switching an input switch (14) associated with the capacitor (12) between a first input potential and a second input potential where the second input potential is proportional to the first input potential. In one specific implementation, the capacitor is a primary capacitor (30) having a three position input switch (46) that is switchable between a ground contact (48), an intermediate contact (42) and the input potential, and a three position output switch (50) that is switchable between a first ground contact (56), a second ground contact (54) and an output potential. A secondary capacitor (32) includes a two position input switch (34) that is switchable between the input voltage and a ground contact (38), and an output switch (40) that is switchable between a ground contact (44) and the intermediate contact (42). The clocking frequency of the primary capacitor (30) enables the input switch (46) to be switched from the ground contact (48) to the intermediate contact (42) to the input voltage. When the input switch (46) of the primary capacitor (30) is connected to the intermediate contact (42), the secondary capacitor (32) is repeatedly switched between the input voltage and ground in order to provide the proportional input voltage. The number of times that the secondary capacitor (32) is switched when the primary capacitor (30) is connected to the intermediate contact (42) and the ratio of the capacitances of the capacitors (30, 32) determines the effective resistance.

Abstract translation: 开关电容器（12）提供具有较长时间常数的有效电阻。 开关电容器（12）包括用于在第一输入电位和第二输入电位之间切换与电容器（12）相关联的输入开关（14）的技术，其中第二输入电位与第一输入电位成比例。 在一个具体实施方案中，电容器是具有可在接地触点（48），中间触点（42）和输入电位之间切换的三位置输入开关（46）的主电容器（30）和三位置输出 开关（50），其可在第一接地触点（56），第二接地触点（54）和输出电位之间切换。 次级电容器（32）包括可在输入电压和接地触点（38）之间切换的两位置输入开关（34），以及输出开关（40），其可在接地触头（44）和中间 联系人（42）。 主电容器（30）的时钟频率使得输入开关（46）能够从接地触点（48）切换到中间触点（42）至输入电压。 当主电容器（30）的输入开关（46）连接到中间触点（42）时，次级电容器（32）在输入电压和地之间重复切换，以提供比例输入电压。 当初级电容器（30）连接到中间触点（42）并且电容器（30,32）的电容的比率确定有效电阻时，次级电容器（32）被切换的次数。

公开(公告)号：US20120049917A1

公开(公告)日：2012-03-01

申请号：US12870464

申请日：2010-08-27

Applicant: THOMAS D. COOK

Inventor： THOMAS D. COOK

IPC: H03K5/12

CPC classification number: H02M3/07

Abstract: A charge pump includes a first counter and a pump stage. The first counter has a control input for receiving a control signal, and an output for providing a first count value. The first count value is incremented in response to the control signal being a first logic state and the first count value is decremented in response to the control signal being a second logic state. The pump stage has a variable capacitor. The variable capacitor has a control input coupled to the output of the first counter for receiving the first count value. The capacitance value of the variable capacitor is changed in response to the first count value changing. The capacitance value is for determining a ramp-up rate of an output voltage at an output of the charge pump.

Abstract translation: 电荷泵包括第一计数器和泵级。 第一计数器具有用于接收控制信号的控制输入和用于提供第一计数值的输出。 第一计数值响应于控制信号是第一逻辑状态而递增，并且第一计数值响应于控制信号是第二逻辑状态而递减。 泵级具有可变电容器。 可变电容器具有耦合到第一计数器的输出的控制输入，用于接收第一计数值。 可变电容器的电容值响应于第一计数值变化而改变。 电容值用于确定电荷泵输出处的输出电压的上升速率。

公开(公告)号：US20110050326A1

公开(公告)日：2011-03-03

申请号：US12549499

申请日：2009-08-28

Applicant: Thomas D. Cook ,  Jeffrey C. Cunningham ,  Karthik Ramanan

Inventor： Thomas D. Cook ,  Jeffrey C. Cunningham ,  Karthik Ramanan

IPC: G05F1/10

CPC classification number: H02M3/07 ,  H02M2003/077

Abstract: A charge pump charges a first capacitor to a predetermined input voltage using a first switch. The first switch is coupled to a first terminal of the first capacitor for coupling the first terminal to an input terminal that receives the predetermined input voltage. A second switch couples a second terminal of the first capacitor to a reference voltage terminal. Charge is sequentially transferred from the first capacitor to an output capacitance by using the first switch. A portion of charge is sequentially removed from the output capacitance to the input terminal using a third switch and a second capacitor. Configuration logic provides control signals to make one or more of a plurality of charge transfer capacitors switch the same as said first capacitor switches.

Abstract translation: 电荷泵使用第一开关将第一电容器充电至预定的输入电压。 第一开关耦合到第一电容器的第一端子，用于将第一端子耦合到接收预定输入电压的输入端子。 第二开关将第一电容器的第二端子耦合到参考电压端子。 通过使用第一开关将充电从第一电容器依次传送到输出电容。 使用第三开关和第二电容器将一部分电荷从输出电容顺序地移除到输入端。 配置逻辑提供控制信号以使得多个电荷转移电容器中的一个或多个与所述第一电容器开关相同。

公开(公告)号：US20090243571A1

公开(公告)日：2009-10-01

申请号：US12055538

申请日：2008-03-26

Applicant: Thomas D. Cook ,  Tahmina Akhter ,  Jeffrey C. Cunningham

Inventor： Thomas D. Cook ,  Tahmina Akhter ,  Jeffrey C. Cunningham

IPC: G05F1/10

CPC classification number: G05F1/575

Abstract: A reference voltage regulation circuit (143) is provided in which one or more input voltage signals (Vref, Vref′) are selectively coupled to a configurable amplifier (114) which is coupled through a sample and hold circuit (120) to a voltage follower circuit (122) which is coupled in feedback to the configurable amplifier (114) for generating an adjusted output voltage at a circuit output (130), where the voltage follow circuit comprises a resistor divider circuit (126) that is controlled by a calibration signal (Cal ) generated by a counter circuit (128) selectively coupled to the output of the configurable amplifier when configured as a comparator for generating the calibration signal in response to a clock signal, where the calibration signal represents a voltage error component (Verror, Voffset) that is removed from the circuit output when the calibration signal is applied to the resistor divider circuit during normal operational.

Abstract translation: 提供了参考电压调节电路（143），其中一个或多个输入电压信号（Vref，Vref'）选择性地耦合到可配置放大器（114），可配置放大器（114）通过采样和保持电路（120）耦合到电压跟随器 电路（122），其反馈耦合到可配置放大器（114），用于在电路输出（130）处产生调整的输出电压，其中电压跟随电路包括由校准信号控制的电阻分压器电路（126） 当被配置为响应于时钟信号产生校准信号的比较器时，选择性地耦合到可配置放大器的输出的计数器电路（128）产生的校准电路（Cal ），其中校准信号表示电压误差 当在正常操作期间将校准信号施加到电阻分压器电路时，从电路输出移除的分量（Verror，Voffset）。

公开(公告)号：US20090039942A1

公开(公告)日：2009-02-12

申请号：US11835552

申请日：2007-08-08

Applicant: Thomas D. Cook ,  Tahmina Akhter ,  Jeffrey C. Cunningham

Inventor： Thomas D. Cook ,  Tahmina Akhter ,  Jeffrey C. Cunningham

IPC: H03L5/00

CPC classification number: H03K3/35613

Abstract: A level converter comprises first and second latches, and first through fourth transistors. The first latch has first and second power supply terminals, and first and second nodes. The second latch has third and fourth power supply terminals, and third and fourth nodes. The first transistor has a first current electrode coupled to the first node, a control electrode coupled to receive a first bias voltage, and a second current electrode. The second transistor has a first current electrode coupled to the second current electrode of the first transistor, a second current electrode coupled to the third node, and a control electrode coupled to receive a second bias voltage. The third transistor has a first current electrode coupled to the second node, a control electrode coupled to receive the first bias voltage, and a second current electrode. The fourth transistor has a first current electrode coupled to the second current electrode of the third transistor, a control electrode coupled to receive the second bias voltage, and a second current electrode coupled to the fourth node.

Abstract translation: 电平转换器包括第一和第二锁存器以及第一至第四晶体管。 第一锁存器具有第一和第二电源端子以及第一和第二节点。 第二锁存器具有第三和第四电源端子，以及第三和第四节点。 第一晶体管具有耦合到第一节点的第一电流电极，耦合以接收第一偏置电压的控制电极和第二电流电极。 第二晶体管具有耦合到第一晶体管的第二电流电极的第一电流电极，耦合到第三节点的第二电流电极和耦合以接收第二偏置电压的控制电极。 第三晶体管具有耦合到第二节点的第一电流电极，耦合以接收第一偏置电压的控制电极和第二电流电极。 第四晶体管具有耦合到第三晶体管的第二电流电极的第一电流电极，耦合以接收第二偏置电压的控制电极和耦合到第四节点的第二电流电极。

公开(公告)号：US5459398A

公开(公告)日：1995-10-17

申请号：US168298

申请日：1993-12-17

Applicant: Mark C. Hansen ,  Roger D. Allison ,  Thomas D. Cook ,  Walter K. Kosiak

Inventor： Mark C. Hansen ,  Roger D. Allison ,  Thomas D. Cook ,  Walter K. Kosiak

IPC: G01P3/489

CPC classification number: G01P3/489

Abstract: An adaptive threshold circuit for use with a magnetic type of sensor that has a pick-up coil. The pick-up coil has an alternating voltage induced therein when a slot formed in a wheel rotates past the sensor. The circuit produces a square wave pulse voltage during positive half-cycles of the voltage generated in the pick-up coil. The circuit includes a digital to analog converter the input of which is connected to a pulse counter. The output of the converter is a function of the count magnitude in the counter and provides a variable threshold voltage that is compared by a voltage comparator with a voltage that is a function of the magnitude of the voltage generated in the pick-up coil. The circuit has an input circuit connected to the pick-up coil that includes a voltage attenuating circuit and a diode. The pulse count of the counter is, at times, incremented under control of a comparator that compares the output voltage of the converter with a voltage that is a function of the magnitude of the voltage generated in the pick-up coil.

Abstract translation: 一种与具有拾取线圈的磁性传感器一起使用的自适应阈值电路。 当形成在车轮中的槽旋转经过传感器时，拾取线圈具有感应在其中的交流电压。 电路在拾取线圈中产生的电压的正半周期期间产生方波脉冲电压。 该电路包括数字到模拟转换器，其输入端连接到脉冲计数器。 转换器的输出是计数器中的计数值的函数，并且提供可变阈值电压，该电压由电压比较器与作为拾取线圈中产生的电压幅度的函数的电压进行比较。 电路具有连接到拾取线圈的输入电路，其包括电压衰减电路和二极管。 计数器的脉冲计数有时在比较器的控制下增加，该比较器将转换器的输出电压与作为拾取线圈中产生的电压幅度的函数的电压进行比较。