公开(公告)号：US20150256151A1

公开(公告)日：2015-09-10

申请号：US14640175

申请日：2015-03-06

申请人： Texas Instruments Incorporated

发明人： Rahul Sharma ,  Vajeed Nimran ,  Jagannathan Venkataraman ,  Sandeep Kesrimal Oswal

IPC分类号： H03H19/00 ,  A61B6/00 ,  A61B6/03 ,  H03M1/12 ,  H02J7/00

CPC分类号： H03H19/004 ,  A61B6/032 ,  A61B6/4208 ,  G01T1/17 ,  H02J7/345 ,  H03H11/1291

摘要： The disclosure provides a circuit that includes an integrator that generates an integrated signal in response to a current signal. A comparator is coupled to the integrator and receives the integrated signal and a primary reference voltage signal. The comparator generates a feedback signal. A switched capacitor network is coupled across the integrator. The feedback signal activates the switched capacitor network.

摘要翻译： 本公开提供了一种电路，其包括响应于当前信号产生积分信号的积分器。 比较器耦合到积分器并接收积分信号和主参考电压信号。 比较器产生反馈信号。 开关电容网络跨越积分器耦合。 反馈信号激活开关电容网络。

公开(公告)号：US20150048881A1

公开(公告)日：2015-02-19

申请号：US14458167

申请日：2014-08-12

申请人： SAMSUNG DISPLAY CO., LTD.

发明人： Oh-Jo Kwon ,  Boo-Dong Kwak ,  Choong-Sun Shin ,  Hee-Sun Ahn

IPC分类号： H03H11/12 ,  H03H11/04

CPC分类号： H03H19/004 ,  G09G3/3233 ,  G09G3/3258 ,  G09G3/3291

摘要： A noise-removing circuit includes a first capacitor to charge a first voltage supplied to a first node during a first period in which a first switching control signal is supplied, a second capacitor to charge a second voltage supplied to a third node during the first period, a third capacitor to charge the first voltage during a second period in which a second switching control signal is supplied, and to charge the second voltage charged in the second capacitor as a third voltage during a third period in which a third switching control signal is supplied, a fourth capacitor to charge the second voltage during the second period, and to charge the first voltage charged in the first capacitor as a fourth voltage during the third period, and a differential amplifier to output a voltage difference between the third voltage and the fourth voltage.

摘要翻译： 噪声消除电路包括：第一电容器，用于在提供第一开关控制信号的第一周期期间对提供给第一节点的第一电压充电;第二电容器，用于在第一周期期间对提供给第三节点的第二电压充电 在供给第二开关控制信号的第二期间对第一电压进行充电的第三电容器，在第三开关控制信号为第三时间段期间，将充电在第二电容器中的第二电压充电为第三电压作为第三电压 提供第四电容器，用于在第二周期期间对第二电压进行充电，并且在第三周期期间将充电在第一电容器中的第一电压充电为第四电压;以及差分放大器，用于输出第三电压和第三电压之间的电压差 第四电压。

公开(公告)号：US08836417B2

公开(公告)日：2014-09-16

申请号：US14014364

申请日：2013-08-30

申请人： Industrial Technology Research Institute

发明人： Ming-Feng Huang

IPC分类号： H03B1/00 ,  H03H21/00 ,  H03H19/00 ,  H03K5/15 ,  H03H15/00

CPC分类号： H03H21/0007 ,  H03H15/023 ,  H03H19/004 ,  H03H2015/007 ,  H03K5/1502

摘要： A charge domain filter (CDF) is provided. The CDF includes a switched-capacitor network (SCN) and a clock generator. An input of the SCN receives an input signal. The SCN samples the input signal according to clock signals with different phases. The clock generator is coupled to the SCN for providing the clock signals. The clock generator adjusts phase differences of the clock signals or pulse widths of the clock signals in accordance with a control signal.

摘要翻译： 提供电荷域滤波器（CDF）。 CDF包括开关电容网络（SCN）和时钟发生器。 SCN的输入接收输入信号。 SCN根据不同相位的时钟信号对输入信号进行采样。 时钟发生器耦合到SCN以提供时钟信号。 时钟发生器根据控制信号调节时钟信号的时钟信号的相位差或时钟信号的脉冲宽度。

公开(公告)号：US20140240156A1

公开(公告)日：2014-08-28

申请号：US14191214

申请日：2014-02-26

申请人： Si-Ware Systems

发明人： Ayman Ismail ,  Ahmed Elshennawy ,  Ahmed Mokhtar ,  Ayman Elsayed

IPC分类号： H03M3/00

CPC分类号： H03M3/368 ,  B81B2207/03 ,  G01R33/038 ,  G06F1/10 ,  G06F1/1694 ,  G06F3/0346 ,  G06F3/0383 ,  H03H11/0422 ,  H03H11/1291 ,  H03H19/004 ,  H03K5/133 ,  H03M1/00 ,  H03M1/12 ,  H03M1/48 ,  H03M1/804 ,  H03M3/30 ,  H03M3/43

摘要： Operating capacitive sensors in force feedback mode has many benefits, such as improved bandwidth, and lower sensitivity to process and temperature variation. To overcome, the non-linearity of the voltage-to-force relation in capacitive feedback, a two-level feedback signal is often used. Therefore, a single-bit Σ-Δ modulator represents a practical way to implement capacitive sensors interface circuits. However, high-Q parasitic modes that exist in high-Q sensors (operating in vacuum) cause a stability problem for the Σ-Δ loop, and hence, limit the applicability of Σ-Δ technique to such sensors. A solution is provided that allows stabilizing the Σ-Δ loop, in the presence of high-Q parasitic modes. The solution is applicable to low or high order Σ-Δ based interfaces for capacitive sensors.

摘要翻译： 操作电容式传感器在力反馈模式具有许多好处，例如改进带宽，以及降低对过程和温度变化的敏感性。 为了克服，电容反馈中的电压 - 力关系的非线性常常被使用在两电平反馈信号中。 因此，单位＆Sgr; - ＆Dgr; 调制器代表实现电容式传感器接口电路的实用方法。 然而，存在于高Q传感器（在真空中操作）的高Q寄生模式导致了＆D ...的稳定性问题。 循环，因此限制了＆Sgr; - ＆Dgr的适用性; 这种传感器的技术。 提供了一种解决方案，可以稳定“ 在存在高Q寄生模式的情况下。 该解决方案适用于低/高级＆Sgr; - ＆Dgr; 用于电容式传感器。

公开(公告)号：US08659350B2

公开(公告)日：2014-02-25

申请号：US13377191

申请日：2010-06-11

申请人： Bas Maria Putter

发明人： Bas Maria Putter

IPC分类号： H03F1/02

CPC分类号： H03F3/005 ,  H03F3/187 ,  H03F2200/03 ,  H03F2200/375 ,  H03F2200/417 ,  H03H19/004

摘要： An amplifier (1) includes an analogue-to-digital converter (ADC) (7) and a switched capacitor output stage (8). The ADC (7) converts an analogue signal into a digital signal containing a sequence of symbols. The switched capacitor output stage (8) charges and discharges a capacitor to produce charge pulses at an output (3). During discharge, switches selectively couple the capacitor to the output (3) in opposite directions to produce charge pulses of opposing polarity. The values of the symbols in the digital signal are used to decide the polarity of charge pulses. In this manner, amplification can be achieved without introducing a direct current (DC) component to the signal at the output (3).

摘要翻译： 放大器（1）包括模拟 - 数字转换器（ADC）（7）和开关电容器输出级（8）。 ADC（7）将模拟信号转换为包含符号序列的数字信号。 开关电容器输出级（8）对电容器进行充电和放电，以在输出端产生电荷脉冲（3）。 在放电期间，开关选择性地将电容器以相反的方向耦合到输出端（3），以产生相反极性的电荷脉冲。 数字信号中的符号值用于确定充电脉冲的极性。 以这种方式，可以在不向输出端（3）处的信号引入直流（DC）分量的情况下实现放大。

公开(公告)号：US08606208B2

公开(公告)日：2013-12-10

申请号：US13553951

申请日：2012-07-20

申请人： Sachio Iida

发明人： Sachio Iida

IPC分类号： H04B1/26

CPC分类号： H03H19/004 ,  H03H19/008

摘要： There is provided a filter circuit including a passive mixer circuit, and a passive switched capacitor circuit that is connected to a rear stage of the passive mixer and includes a flying capacitor. The passive mixer circuit generates a baseband signal by multiplying an input signal supplied from a predetermined signal source impedance by each local oscillation signal and outputs the baseband signal to the passive switched capacitor circuit, the passive switched capacitor circuit performs predetermined filtering on the baseband signal supplied from the passive mixer circuit and outputs the processed baseband signal, and a capacitance of the flying capacitor of the passive switched capacitor circuit is a capacitance by which input impedance of the passive mixer circuit is matched to the signal source impedance.

摘要翻译： 提供了一种包括无源混频器电路和无源开关电容器电路的滤波电路，其被连接到无源混频器的后级并且包括飞行电容器。 无源混频器电路通过将从预定信号源阻抗提供的输入信号乘以每个本地振荡信号产生基带信号，并将基带信号输出到无源开关电容器电路，无源开关电容器电路对提供的基带信号执行预定滤波 从无源混频器电路输出处理后的基带信号，无源开关电容电路的飞电容器的电容是无源混频器电路的输入阻抗与信号源阻抗匹配的电容。

公开(公告)号：US08589470B2

公开(公告)日：2013-11-19

申请号：US12388502

申请日：2009-02-18

申请人： Ming-Feng Huang

发明人： Ming-Feng Huang

IPC分类号： G06G7/02 ,  H04B1/26

CPC分类号： H03H19/004

摘要： A down conversion filter with a plurality of sampling capacitor, wherein at least one sampling capacitor is discharged in sampling phases or charge-summing phases of the other sampling capacitors.

摘要翻译： 具有多个采样电容器的下变频滤波器，其中至少一个采样电容器在其它采样电容器的采样相位或电荷求和相位中放电。

公开(公告)号：US20130208922A1

公开(公告)日：2013-08-15

申请号：US13808604

申请日：2011-08-02

申请人： Germano Nicollini ,  Federico Guanziroli ,  Massimo Orio ,  Carlo Pinna

发明人： Germano Nicollini ,  Federico Guanziroli ,  Massimo Orio ,  Carlo Pinna

IPC分类号： H03F3/181

CPC分类号： H03F3/181 ,  H03F1/30 ,  H03F1/34 ,  H03F3/187 ,  H03F3/213 ,  H03F3/45475 ,  H03F3/45968 ,  H03F3/45973 ,  H03F2200/03 ,  H03F2200/156 ,  H03F2200/271 ,  H03F2203/45136 ,  H03F2203/45156 ,  H03F2203/45212 ,  H03F2203/45512 ,  H03F2203/45514 ,  H03F2203/45534 ,  H03F2203/45544 ,  H03H19/004

摘要： The invention relates to an electronic integrated amplifier for driving an acoustic transducer. The amplifier comprises two differential input terminals to receive an input signal and a first and a second output terminal to provide an output signal to the transducer. In addition, the amplifier comprises an operational amplifier having an input end including differential inputs and an output end operatively associated with the first and second output terminals. A pair of input resistors connect the two differential input terminals to two intermediate terminals, respectively. A pair of feedback resistors connect the first and second output terminals to the two intermediate terminals, respectively. The integrated amplifier also comprises means for high-pass filtering the input signal. Such filtering means is characterized in that it comprises an input element interposed between said intermediate terminals and the input end of the operational amplifier, and a feedback element connected between the input end and the output end of the same operational amplifier.

摘要翻译： 本发明涉及一种用于驱动声换能器的电子集成放大器。 放大器包括用于接收输入信号的两个差分输入端子和第一和第二输出端子以向换能器提供输出信号。 此外，放大器包括具有包括差分输入的输入端和与第一和第二输出端可操作地相关联的输出端的运算放大器。 一对输入电阻分别将两个差分输入端子连接到两个中间端子。 一对反馈电阻分别将第一和第二输出端子连接到两个中间端子。 集成放大器还包括用于对输入信号进行高通滤波的装置。 这种滤波装置的特征在于它包括插入在所述中间端子和运算放大器的输入端之间的输入元件，以及连接在同一运算放大器的输入端和输出端之间的反馈元件。

公开(公告)号：US20130127516A1

公开(公告)日：2013-05-23

申请号：US13739406

申请日：2013-01-11

申请人： MAXIM INTEGRATED PRODUCTS, INC.

发明人： Hae-Seung Lee

IPC分类号： H03H19/00

CPC分类号： H03H19/004 ,  G11C7/06 ,  G11C27/026 ,  H03M1/0607 ,  H03M1/403 ,  H03M1/442 ,  H03M3/356

摘要： A comparator based circuit with effective offset cancellation includes first and second amplifiers and an offset capacitor operatively connected to the first and second amplifiers. An offset voltage source generates an offset voltage. A first switch connects the offset voltage source to ground during a first time period. The first amplifier generates an output voltage in response to the first switch connecting the offset voltage source to ground during the first time period. A second switch connects the offset capacitor to ground during a second time period. The first switch disconnects the offset voltage source from ground during a third time period, and the second switch disconnects the offset capacitor from ground during the third time period

摘要翻译： 具有有效偏移消除的基于比较器的电路包括第一和第二放大器以及可操作地连接到第一和第二放大器的偏移电容器。 偏移电压源产生偏移电压。 在第一时间段期间，第一开关将偏移电压源连接到地。 第一放大器响应于在第一时间段期间将偏移电压源连接到地的第一开关产生输出电压。 在第二时间段内，第二开关将偏移电容器接地。 第一个开关在第三个时间段内断开偏移电压源与地的连接，第二个开关在第三个时间段内将偏移电容器与地线断开

公开(公告)号：US20130113550A1

公开(公告)日：2013-05-09

申请号：US13288783

申请日：2011-11-03

申请人： Gaurav Bawa ,  William Todd Harrison

发明人： Gaurav Bawa ,  William Todd Harrison

IPC分类号： H03B1/00

CPC分类号： H03H19/004

摘要： A filter is implemented as cascaded stages, and in at least one stage all resistances are implemented as double-sampled switched-capacitor circuits. In a variation, at least one resistance is implemented as a double-sampled switched-capacitor T-network. In a variation, in an integrator stage, a resistance is implemented as a transconductance, and the cutoff frequency of the integrator stage scales with a switching frequency of a DC-DC voltage converter.

摘要翻译： 滤波器被实现为级联级，并且在至少一级中，所有电阻都被实现为双采样开关电容器电路。 在一个变型中，至少一个电阻被实现为双采样开关电容器T网络。 在一个变型中，在积分器级中，电阻被实现为跨导，并且积分器级的截止频率以DC-DC电压转换器的开关频率进行放大。