公开(公告)号：US09479865B2

公开(公告)日：2016-10-25

申请号：US14231192

申请日：2014-03-31

Applicant: Analog Devices Global

Inventor： Khiem Quang Nguyen ,  Kim Spetzler Berthelsen ,  Robert Adams

IPC: H04R3/00 ,  H03M3/00 ,  H03F3/181 ,  H03F3/38 ,  H03F1/32 ,  G06F3/043

CPC classification number: H04R3/00 ,  G06F3/0433 ,  H03F1/32 ,  H03F3/181 ,  H03F3/38 ,  H03F2200/03 ,  H03M3/356

Abstract: A transducer amplification circuit may include a preamplifier circuit with a signal input receiving a transducer signal to provide an amplified transducer signal comprising audible frequency components and ultrasonic frequency components. The transducer amplification circuit may include a first sigma-delta modulator configured to sample and quantize the amplified transducer signal to generate a first digital transducer signal comprising a first quantization noise signal. The first sigma-delta modulator may include a first noise transfer function having a high pass response in at least a portion of an audible frequency range to push the quantization noise signal to ultrasonic frequencies. A second sigma-delta modulator is configured to sample and quantize the amplified transducer signal to generate a second digital transducer signal comprising a second quantization noise signal. The second sigma-delta modulator may include a second noise transfer function with a magnitude minimum placed at the ultrasonic frequencies.

Abstract translation: 换能器放大电路可以包括具有接收换能器信号的信号输入的前置放大器电路，以提供包括可听频率分量和超声频率分量的放大的换能器信号。 换能器放大电路可以包括第一Σ-Δ调制器，其被配置为对放大的换能器信号进行采样和量化，以产生包括第一量化噪声信号的第一数字换能器信号。 第一Σ-Δ调制器可以包括在可听频率范围的至少一部分中具有高通响应的第一噪声传递函数，以将量化噪声信号推送到超声波频率。 第二Σ-Δ调制器被配置为对放大的换能器信号进行采样和量化，以产生包括第二量化噪声信号的第二数字换能器信号。 第二Σ-Δ调制器可以包括放大在超声波频率处的幅度最小的第二噪声传递函数。

公开(公告)号：US20160265995A1

公开(公告)日：2016-09-15

申请号：US14657323

申请日：2015-03-13

Applicant: Rosemount Inc.

Inventor： Rongtai Wang ,  John Paul Schulte

IPC: G01L9/00 ,  H03M3/00

CPC classification number: H03M3/39 ,  G01D5/24 ,  G01L9/0072 ,  G01L9/0075 ,  G01L9/12 ,  H03M3/356 ,  H03M3/376 ,  H03M3/494

Abstract: A single plate capacitance sensor includes a sensor capacitor and a reference capacitor that share common plate. A capacitance-to-digital sigma delta modulator provides separate sensor excitation and reference excitation signals to the sensor capacitor and the reference capacitor to provide high resolution detection. Programmable ratio-metric excitation voltages and adaptive excitation voltage sources can be used to enhance modulator performance.

Abstract translation: 单板电容传感器包括传感器电容器和共用共用板的参考电容器。 电容数字Σ-Δ调制器向传感器电容器和参考电容器提供单独的传感器激励和参考激励信号，以提供高分辨率检测。 可编程比率公制激励电压和自适应激励电压源可用于增强调制器性能。

公开(公告)号：US20160112795A1

公开(公告)日：2016-04-21

申请号：US14516736

申请日：2014-10-17

Applicant: Infineon Technologies AG

Inventor： Elmar Bach ,  Patrizia Greco ,  Snezana Stojanovic ,  Dietmar Straeussnigg

IPC: H04R3/02 ,  H03M3/00

CPC classification number: H03M3/464 ,  H03M3/34 ,  H03M3/356 ,  H03M3/424 ,  H03M3/458

Abstract: A modulator is configured to respond to input swings by providing a feedback voltage via a feedback path to compromise an increase in noise and distortion power with increasing signal power at signal levels exceeding a predetermined threshold. A digital-to-analog converter (DAC) generates a feedback voltage with a resistor string biased with a given current and switches as a function of an input value to mitigate the voltage swing at a summing node.

Abstract translation: 调制器被配置为通过经由反馈路径提供反馈电压来响应于输入摆幅，以通过在超过预定阈值的信号电平上增加信号功率来危及噪声和失真功率的增加。 数模转换器（DAC）产生具有以给定电流偏置的电阻串的反馈电压，并根据输入值切换以减轻求和节点处的电压摆幅。

公开(公告)号：US08373489B2

公开(公告)日：2013-02-12

申请号：US12909168

申请日：2010-10-21

Applicant: Hae-Seung Lee

Inventor： Hae-Seung Lee

IPC: G06F7/64

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

Abstract: 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.

公开(公告)号：US08344928B2

公开(公告)日：2013-01-01

申请号：US12943241

申请日：2010-11-10

Applicant: Yannick Guedon ,  Kien Beng Tan

Inventor： Yannick Guedon ,  Kien Beng Tan

IPC: H03M1/12

CPC classification number: H03M3/356 ,  H03K17/962 ,  H03M3/43 ,  H03M3/456

Abstract: A capacitance-to-digital converter for an extended range of capacitances includes a reference capacitor and one or more offset capacitors. Electrical charge accumulated in the offset capacitors is used to at least partially cancel the charge accumulated in a sensed capacitance to facilitate matching with a charge accumulated in the reference capacitor. The residual charge is passed to an integrator, the output from which is quantized and used to control switching of the capacitors. Immunity to tonal external noises and improved conversion speed are achieved by controlling the capacitor switching with a spread spectrum clock. The capacitance-to-digital converter may be used, for example, for sensing of the capacitances of capacitive elements in touch and proximity displays or other user interfaces.

Abstract translation: 用于扩展电容范围的电容数字转换器包括参考电容器和一个或多个失调电容器。 积分在偏移电容器中的电荷用于至少部分地消除在感测电容中累积的电荷，以便于与参考电容器中累积的电荷匹配。 剩余电荷被传递到积分器，其输出被量化并用于控制电容器的开关。 通过用扩频时钟控制电容器切换，实现对音调外部噪声和转换速度的提高。 电容数字转换器可以用于例如感​​测触摸和接近显示器或其他用户接口中的电容元件的电容。

公开(公告)号：US20120112817A1

公开(公告)日：2012-05-10

申请号：US12943241

申请日：2010-11-10

Applicant: Yannick Guedon ,  Kien Beng Tan

Inventor： Yannick Guedon ,  Kien Beng Tan

IPC: H03K17/945 ,  H03M1/12

CPC classification number: H03M3/356 ,  H03K17/962 ,  H03M3/43 ,  H03M3/456

Abstract: A capacitance-to-digital converter for an extended range of capacitances includes a reference capacitor and one or more offset capacitors. Electrical charge accumulated in the offset capacitors is used to at least partially cancel the charge accumulated in a sensed capacitance to facilitate matching with a charge accumulated in the reference capacitor. The residual charge is passed to an integrator, the output from which is quantized and used to control switching of the capacitors. Immunity to tonal external noises and improved conversion speed are achieved by controlling the capacitor switching with a spread spectrum clock. The capacitance-to-digital converter may be used, for example, for sensing of the capacitances of capacitive elements in touch and proximity displays or other user interfaces.

Abstract translation: 用于扩展电容范围的电容数字转换器包括参考电容器和一个或多个失调电容器。 积分在偏移电容器中的电荷用于至少部分地消除在感测电容中累积的电荷，以便于与参考电容器中累积的电荷匹配。 剩余电荷被传递到积分器，其输出被量化并用于控制电容器的开关。 通过用扩频时钟控制电容器切换，实现对音调外部噪声和转换速度的提高。 电容数字转换器可以用于例如感​​测触摸和接近显示器或其他用户接口中的电容元件的电容。

公开(公告)号：US20120046894A1

公开(公告)日：2012-02-23

申请号：US13285725

申请日：2011-10-31

Applicant: Arne Aas ,  Gunnar Gangstoe ,  Torgeir Fenheim

Inventor： Arne Aas ,  Gunnar Gangstoe ,  Torgeir Fenheim

IPC: H03M1/06 ,  G01R31/36

CPC classification number: G01R19/0092 ,  G01R19/2509 ,  H03M1/0607 ,  H03M1/0656 ,  H03M3/34 ,  H03M3/356

Abstract: A method and system utilized with an analog to digital converter is disclosed. The method and system comprise providing a first conversion on an input signal. In the first conversion, an offset error is added to the input signal to provide a first result. The method and system further includes providing a second conversion on the input signal. In the second conversion, an offset error is subtracted from the input signal to provide a second result. The first and second results are then combined to substantially remove the offset error. A system and method in accordance with the present invention compensates for the accumulated offset error over many samples, thereby achieving much higher accuracy in the offset error compensation.

Abstract translation: 公开了一种使用模数转换器的方法和系统。 该方法和系统包括在输入信号上提供第一转换。 在第一次转换中，偏移误差被添加到输入信号以提供第一结果。 该方法和系统还包括对输入信号提供第二转换。 在第二转换中，从输入信号中减去偏移误差以提供第二结果。 然后组合第一和第二结果以基本上去除偏移误差。 根据本发明的系统和方法补偿多个样本上的累积偏移误差，从而在偏移误差补偿中获得高得多的精度。

公开(公告)号：US20110050473A1

公开(公告)日：2011-03-03

申请号：US12801062

申请日：2010-05-20

Applicant: Wun-Ki Jung ,  Seog Heon Ham ,  Dong Hun Lee ,  Kwi Sung Yoo ,  Min Ho Kwon

Inventor： Wun-Ki Jung ,  Seog Heon Ham ,  Dong Hun Lee ,  Kwi Sung Yoo ,  Min Ho Kwon

IPC: H03M3/00

CPC classification number: H03M3/356 ,  H03M3/458

Abstract: An analog-digital converter (ADC) includes a correlated double sampling (CDS) circuit configured to perform CDS on each of a reset signal and an image signal output from a pixel to generate a correlated double sampled reset signal and a correlated double sampled image signal, respectively. A delta sigma (ΔΣ) ADC, also included in the ADC, is configured to output a difference between a first digital code that is generated by performing ΔΣ analog-digital conversion on the correlated double sampled reset signal and a second digital code that is generated by performing ΔΣ analog-digital conversion on the correlated double sampled image signal.

Abstract translation: 模拟数字转换器（ADC）包括相关双采样（CDS）电路，其被配置为在复位信号和从像素输出的图像信号中的每一个上执行CDS，以产生相关的双采样复位信号和相关的双采样图像信号 ， 分别。 还包括在ADC中的Δ西格玛（＆Dgr;＆Sgr）ADC被配置为输出通过执行＆Dgr＆amp; Sgr生成的第一数字代码之间的差异。 对相关的双重采样复位信号进行模拟数字转换和通过执行＆Dgr＆amp; 对相关双采样图像信号进行模数转换。

公开(公告)号：US20110032003A1

公开(公告)日：2011-02-10

申请号：US12909168

申请日：2010-10-21

Applicant: Hae-Seung Lee

Inventor： Hae-Seung Lee

IPC: G11C27/02

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

Abstract: 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.

Abstract translation: 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：US20090206824A1

公开(公告)日：2009-08-20

申请号：US12430209

申请日：2009-04-27

Applicant: Heinrich FELDOTTE ,  Alfred Klauer

Inventor： Heinrich FELDOTTE ,  Alfred Klauer

IPC: G01R29/00

CPC classification number: H03M3/34 ,  H03M3/356 ,  H03M3/43 ,  H03M3/456

Abstract: Measurement amplification methods and devices for detecting a monopolar input signal (UE) by integrating A/D conversion. Before being digitized, the input signal (UE) is inverted according to the so-called Chopper principle and converted into a bipolar intermediate signal (UZ). A reference voltage (Uref) used in A/D conversion undergoes polarity changes synchronized with the polarity changes of the intermediate signal (UZ). Offset and drift are eliminated by totaling an even number of individual measurements.

Abstract translation: 通过集成A / D转换来检测单极性输入信号（UE）的测量放大方法和装置。 在数字化之前，输入信号（UE）根据所谓的斩波原理反转并转换成双极性中间信号（UZ）。 在A / D转换中使用的参考电压（Uref）经历与中间信号（UZ）的极性变化同步的极性改变。 通过合计偶数个别测量消除偏移和漂移。