公开(公告)号：US06331768B1

公开(公告)日：2001-12-18

申请号：US09593734

申请日：2000-06-13

申请人： Joseph Drori ,  Allan Ming-Lun Lin

发明人： Joseph Drori ,  Allan Ming-Lun Lin

IPC分类号： H03H100

CPC分类号： H03H7/24

摘要： Disclosed are solid-state potentiometers having high resolution and high accuracy. An exemplary potentiometer has a first main terminal, a second main terminal, a wiper terminal, and a resistor stack having a plurality M of resistors coupled in series to one another at a plurality of M−1 internal nodes. Each of the resistors in the stack has substantially the same value of RS ohms. The potentiometer further has a first variable resistance network coupled between one end of the resistor stack and the potentiometer's first main terminal, and a second variable resistance network coupled between the other end of the resistor stack and the potentiometer's second main terminal. The first variable resistance network has a variable resistance value R1 which varies between zero ohms and RP ohms. The second variable resistance network has a variable resistance value R2 which is maintained substantially at value of (RP−R1). The wiper terminal is selectively coupled to one of the internal nodes of the resistor stack, or to one of the ends of the resistor stack, to provide a coarse setting of the potentiometer's wiper position. The resistances of the variable resistance networks are changed to provide the fine resolution for the potentiometer's wiper position. The present invention provides a large number of discrete wiper positions with a constant end-to-end resistance, while using a small number of resistors and transistors relative to prior art implementations.

摘要翻译： 公开了具有高分辨率和高精度的固态电位计。 示例性电位器具有第一主端子，第二主端子，擦拭器端子和电阻器堆叠，其具有在多个M-1内部节点处彼此串联耦合的多个M个电阻器。 堆叠中的每个电阻器具有基本上相同的RS欧姆值。 电位计还具有耦合在电阻器堆叠的一端和电位器的第一主端子之间的第一可变电阻网络，以及耦合在电阻器堆叠的另一端和电位器的第二主端子之间的第二可变电阻网络。 第一可变电阻网络具有在零欧姆和RP欧姆之间变化的可变电阻值R1。 第二可变电阻网络具有基本上保持（RP-R1）的值的可变电阻值R2。 刮水器端子选择性地耦合到电阻器堆叠的一个内部节点，或者耦合到电阻器堆叠的一个端部，以提供电位器的抽头位置的粗略设置。 改变可变电阻网络的电阻，为电位器的抽头位置提供精细的分辨率。 本发明提供了大量具有恒定端对端电阻的离散抽头位置，同时相对于现有技术实现使用少量电阻器和晶体管。

公开(公告)号：US06555996B2

公开(公告)日：2003-04-29

申请号：US10007602

申请日：2001-11-13

申请人： Joseph Drori ,  Allan Ming-Lun Lin

发明人： Joseph Drori ,  Allan Ming-Lun Lin

IPC分类号： H03H100

CPC分类号： H03H7/24

摘要： Disclosed are solid-state potentiometers having high resolution and high accuracy. An exemplary potentiometer comprises a first main terminal, a second main terminal, a wiper terminal, and a resistor stack comprising a plurality M of resistors coupled in series to one another at a plurality of M−1 internal nodes. Each of the resistors in the stack has substantially the same value of RS ohms. The potentiometer further comprises a first variable resistance network coupled between one end of the resistor stack and the potentiometer's first main terminal, and a second variable resistance network coupled between the other end of the resistor stack and the potentiometer's second main terminal. The first variable resistance network has a variable resistance value R1 which varies between zero ohms and RP ohms. The second variable resistance network has a variable resistance value R2 which is maintained substantially at value of (RP−R1). The wiper terminal is selectively coupled to one of the internal nodes of the resistor stack, or to one of the ends of the resistor stack, to provide a coarse setting of the potentiometer's wiper position. The resistances of the variable resistance networks are changed to provide the fine resolution for the potentiometer's wiper position. The present invention provides a large number of discrete wiper positions with a constant end-to-end resistance, while using a small number of resistors and transistors relative to prior art implementations. A further advantage of the invention is that the potentiometer may be constructed with a small number of selection transistors turned on within the current path between the potentiometer's main terminals, thereby providing higher accuracy.

公开(公告)号：US06194888B1

公开(公告)日：2001-02-27

申请号：US09402385

申请日：1999-10-04

申请人： Toshiyuki Matsumoto ,  Yoshihiro Hirota ,  Muneo Harada

发明人： Toshiyuki Matsumoto ,  Yoshihiro Hirota ,  Muneo Harada

IPC分类号： H03H100

CPC分类号： G01R27/2605

摘要： An impedance-to-voltage converter utilizes an operational amplifier to convert an impedance into a voltage without suffering from the influence of stray capacitances. The impedance-to-voltage converter is formed of an operational amplifier which has an imaginary short-circuit state between an inverting input and a non-inverting input thereof when an impedance element is connected between an output and the inverting input, a shielding line for shielding a line for connecting the impedance element to the inverting input, an AC signal generator connected to the non-inverting input, and a shielding line for shielding the signal line. The shielding lines are connected to the non-inverting input.

摘要翻译： 阻抗 - 电压转换器利用运算放大器将阻抗转换成电压而不受杂散电容的影响。 阻抗 - 电压转换器由运算放大器形成，当在输出端和反相输入端之间连接有阻抗元件时，其运算放大器具有反相输入端和非反相输入端之间的假想短路状态， 屏蔽用于将阻抗元件连接到反相输入的线，连接到非反相输入的AC信号发生器和用于屏蔽信号线的屏蔽线。 屏蔽线连接到非反相输入。

公开(公告)号：US06636027B1

公开(公告)日：2003-10-21

申请号：US09695129

申请日：2000-10-24

申请人： Louis R. Nerone

发明人： Louis R. Nerone

IPC分类号： H03H100

CPC分类号： H05B33/0809 ,  H05B33/0821 ,  Y02B20/342 ,  Y10S323/908

摘要： A cost and space efficient diode circuit arrangement for limiting current from an AC source using only a few components, the circuit includes a capacitor coupled to an AC source and at least two oppositely polarized diodes connected in parallel. This circuit may be used in a variety of applications. For example, the circuit finds particular use in household appliances and electronics, such as vacuum cleaners, where electrical compartment space for light emitting diodes (LEDs) is constrained.

摘要翻译： 一种用于仅使用少量组件限制来自AC电源的电流的成本和空间有效的二极管电路装置，该电路包括耦合到AC电源的电容器和并联连接的至少两个相对极化的二极管。 该电路可用于各种应用。 例如，该电路在家用电器和电子设备中特别有用，例如真空吸尘器，其中发光二极管（LED）的电室空间被限制。

公开(公告)号：US06359428B1

公开(公告)日：2002-03-19

申请号：US09605055

申请日：2000-06-28

申请人： Akinobu Kawamura

发明人： Akinobu Kawamura

IPC分类号： H03H100

CPC分类号： H03M1/765 ,  H03K17/693

摘要： A voltage output device outputs an analog voltage obtained by dividing a supply voltage with a plurality of resistor elements. The resistor elements are individually connected in parallel with fuse elements and switching transistors. The fuse elements have a resistance sufficiently lower than the resistor elements. The voltage output device also has a controller that controls, in accordance with an input signal fed thereto, the on/off states of the switching elements. The fuse elements connected in parallel with the transistors that are turned on remain intact without blowing, and the fuse elements connected in parallel with the transistors that are kept off blow. The fuse elements blow when a current higher than a predetermined value is passed therethrough, and this permits adjustment of the value of the output analog voltage.

摘要翻译： 电压输出装置输出通过将电源电压与多个电阻元件分开而获得的模拟电压。 电阻元件与熔丝元件和开关晶体管并联连接。 熔丝元件的电阻足够低于电阻元件。 电压输出装置还具有控制器，该控制器根据向其馈送的输入信号控制开关元件的导通/截止状态。 与导通的晶体管并联连接的熔丝元件保持原样，不会发生熔断，并且与保持断开的晶体管并联连接的熔丝元件。 当高于预定值的电流通过时，熔丝元件吹动，这允许调节输出模拟电压的值。

公开(公告)号：US06784756B2

公开(公告)日：2004-08-31

申请号：US10376166

申请日：2003-02-28

申请人： David A. Villella

发明人： David A. Villella

IPC分类号： H03H100

CPC分类号： H03L1/04 ,  H03L1/026 ,  H03L1/028

摘要： An oven controlled crystal oscillator has an onboard processor containing an algorithm used to generate a frequency compensating signal based on a predetermined relationship and a monitored current consumption of a heater.

摘要翻译： 炉控晶体振荡器具有板载处理器，其包含用于基于加热器的预定关系和监视的电流消耗来产生频率补偿信号的算法。

公开(公告)号：US06674321B1

公开(公告)日：2004-01-06

申请号：US10211765

申请日：2002-08-01

申请人： Robert A. York

发明人： Robert A. York

IPC分类号： H03H100

CPC分类号： H01G7/06 ,  H03H5/12 ,  H03H7/0153 ,  H03H7/38 ,  H03H2210/025 ,  H03J3/185

摘要： A capacitive element includes two or more voltage-variable capacitors (varactors). The varactors are configured so that they are coupled in series with respect to an applied AC signal and are coupled in parallel with respect to an applied DC bias voltage. The effective capacitance of the overall capacitive element can be tuned by varying the DC bias voltage.

公开(公告)号：US06342782B1

公开(公告)日：2002-01-29

申请号：US09623197

申请日：2000-10-13

申请人： Hisashi Yamaguchi ,  Tadashi Yasue

发明人： Hisashi Yamaguchi ,  Tadashi Yasue

IPC分类号： H03H100

CPC分类号： G09G3/3696 ,  G09G2330/021

摘要： A power supply device for driving liquid crystal which generates four liquid crystal drive voltages V1 and V4 between first and second reference voltages, the power supply device comprising: a voltage division circuit 102 which divides a voltage between voltages between voltages V1 and V5 and generates four pairs of first voltages NV1 to NV4 and second voltages PV1 to PV4; and four impedance conversion circuits 103 and 104 which generate impedance converted liquid crystal drive voltages V1 to V4 based on the four pairs of the first and second voltages. Each impedance conversion circuit comprises voltage follower type of differential amplifier circuits 120 and 110 to which a pair of the first and second voltages is input, and an output circuit 130 which is driven by the differential amplification circuits. The N-type transistor 134 and P-type transistor 132 in the output circuit are independently driven by the first and second output voltages VN, VP from the differential amplification circuits 120 and 110.