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公开(公告)号：US20190386673A1
公开(公告)日：2019-12-19
申请号：US16424984
申请日：2019-05-29
摘要： In accordance with an embodiment, a method of monitoring a data converter includes determining a multiplicity of time-associated linearity parameters that describe a linearity of the data converter at a multiplicity of different times, and determining a state of the data converter based on comparing at least one linearity parameter of the multiplicity of time-associated linearity parameters with a comparison parameter.
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公开(公告)号：US10171046B2
公开(公告)日：2019-01-01
申请号：US14935072
申请日：2015-11-06
摘要： According to an embodiment, a method includes amplifying a signal provided by a capacitive signal source to form an amplified signal, detecting a peak voltage of the amplified signal, and adjusting a controllable impedance coupled to an output of the capacitive signal source in response to detecting the peak voltage. The controllable impedance is adjusted to a value inversely proportional to the detected peak voltage.
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公开(公告)号：US09455671B2
公开(公告)日：2016-09-27
申请号：US14738353
申请日：2015-06-12
CPC分类号： H03F1/083 , H03F1/086 , H03F3/183 , H03F3/187 , H03F3/45475 , H03F2200/03 , H03F2200/129 , H04R3/00 , H04R19/04
摘要： In accordance with an embodiment, a system for amplifying a signal provided by a capacitive signal source includes a first voltage follower device, a second voltage follower device, and a first capacitor. The first voltage follower device includes an input terminal configured to be coupled to a first terminal of the capacitive signal source, and the second voltage follower device includes an input terminal coupled to the first output terminal of the first voltage follower device, and an output terminal coupled to a second output terminal of the first voltage follower device. Furthermore, first capacitor has a first end coupled to a first output terminal of the first voltage follower device, and a second end configured to be coupled to a second terminal of the capacitive signal source.
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公开(公告)号：US20140077882A1
公开(公告)日：2014-03-20
申请号：US13623583
申请日：2012-09-20
IPC分类号： H03G3/00
CPC分类号： H03F3/005 , H03F3/45475 , H03F2200/411 , H03F2203/45512 , H03F2203/45544 , H03F2203/45561 , H03G1/0094
摘要： In accordance with an embodiment, a system includes a programmable gain amplifier having a switchable feedback capacitor coupled in parallel with a first capacitor and a controller. The controller is configured to couple the feedback capacitor between an input node of the programmable gain amplifier and an output node of the programmable gain amplifier in a first gain setting, and switch a first terminal of the feedback capacitor from the output of the programmable gain amplifier to a reference node while a second terminal of the feedback capacitor remains coupled to the input node of the programmable gain amplifier for a first time period when transitioning from the first gain setting to a second gain setting.
摘要翻译： 根据实施例，系统包括可编程增益放大器，其具有与第一电容器和控制器并联耦合的可切换反馈电容器。 控制器被配置为在第一增益设置中将可编程增益放大器的输入节点和可编程增益放大器的输出节点之间的反馈电容器耦合，并且从可编程增益放大器的输出端切换反馈电容器的第一端子 到反馈电容器的第二端子在从第一增益设置转换到第二增益设置的第一时间段期间保持耦合到可编程增益放大器的输入节点。
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公开(公告)号：US10924069B2
公开(公告)日：2021-02-16
申请号：US16171741
申请日：2018-10-26
摘要： According to an embodiment, a method includes amplifying a signal provided by a capacitive signal source to form an amplified signal, detecting a peak voltage of the amplified signal, and adjusting a controllable impedance coupled to an output of the capacitive signal source in response to detecting the peak voltage. The controllable impedance is adjusted to a value inversely proportional to the detected peak voltage.
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公开(公告)号：US20190068139A1
公开(公告)日：2019-02-28
申请号：US16171741
申请日：2018-10-26
摘要： According to an embodiment, a method includes amplifying a signal provided by a capacitive signal source to form an amplified signal, detecting a peak voltage of the amplified signal, and adjusting a controllable impedance coupled to an output of the capacitive signal source in response to detecting the peak voltage. The controllable impedance is adjusted to a value inversely proportional to the detected peak voltage.
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公开(公告)号：US10057795B2
公开(公告)日：2018-08-21
申请号：US15610840
申请日：2017-06-01
发明人： Florian Starzer , Peter Bogner , Oliver Frank , Guenter Haider , Michael Kropfitsch , Thomas Sailer , Jochen O. Schrattenecker , Rainer Stuhlberger
CPC分类号： H04W24/06 , H03F3/195 , H03F2200/165 , H03F2200/333 , H03F2200/451 , H03M1/1245 , H04B1/16
摘要： A radio frequency (RF) receive circuit is described herein. In accordance with one embodiment, the RF receive circuit includes a mixer configured to receive an RF input signal to down-convert the RF input signal into a base-band or intermediate frequency (IF) band, an analog-to-digital converter (ADC), and a signal processing chain coupled between the mixer and the ADC. The signal processing chain includes at least two circuit nodes. The RF receive circuit further includes an oscillator circuit that is configured to generate a test signal. The oscillator circuit is coupled to the signal processing chain and is configured to selectively feed the oscillator signal into one of the at least two circuit nodes.
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公开(公告)号：US08872589B2
公开(公告)日：2014-10-28
申请号：US13623583
申请日：2012-09-20
IPC分类号： H03G3/12
CPC分类号： H03F3/005 , H03F3/45475 , H03F2200/411 , H03F2203/45512 , H03F2203/45544 , H03F2203/45561 , H03G1/0094
摘要： In accordance with an embodiment, a system includes a programmable gain amplifier having a switchable feedback capacitor coupled in parallel with a first capacitor and a controller. The controller is configured to couple the feedback capacitor between an input node of the programmable gain amplifier and an output node of the programmable gain amplifier in a first gain setting, and switch a first terminal of the feedback capacitor from the output of the programmable gain amplifier to a reference node while a second terminal of the feedback capacitor remains coupled to the input node of the programmable gain amplifier for a first time period when transitioning from the first gain setting to a second gain setting.
摘要翻译： 根据实施例，系统包括可编程增益放大器，其具有与第一电容器和控制器并联耦合的可切换反馈电容器。 控制器被配置为在第一增益设置中将可编程增益放大器的输入节点和可编程增益放大器的输出节点之间的反馈电容器耦合，并且从可编程增益放大器的输出端切换反馈电容器的第一端子 到反馈电容器的第二端子在从第一增益设置转换到第二增益设置的第一时间段期间保持耦合到可编程增益放大器的输入节点。
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公开(公告)号：US20140119573A1
公开(公告)日：2014-05-01
申请号：US13665117
申请日：2012-10-31
CPC分类号： H03F1/083 , H03F1/086 , H03F3/183 , H03F3/187 , H03F3/45475 , H03F2200/03 , H03F2200/129 , H04R3/00 , H04R19/04
摘要： In accordance with an embodiment, a system for amplifying a signal provided by a capacitive signal source includes a first voltage follower device, a second voltage follower device, and a first capacitor. The first voltage follower device includes an input terminal configured to be coupled to a first terminal of the capacitive signal source, and the second voltage follower device includes an input terminal coupled to the first output terminal of the first voltage follower device, and an output terminal coupled to a second output terminal of the first voltage follower device. Furthermore, first capacitor has a first end coupled to a first output terminal of the first voltage follower device, and a second end configured to be coupled to a second terminal of the capacitive signal source.
摘要翻译： 根据实施例，用于放大由电容信号源提供的信号的系统包括第一电压跟随器件，第二电压跟随器件和第一电容器。 第一电压跟随器件包括被配置为耦合到电容性信号源的第一端子的输入端子，并且第二电压跟随器件包括耦合到第一电压跟随器件的第一输出端子的输入端子和输出端子 耦合到第一电压跟随器件的第二输出端子。 此外，第一电容器具有耦合到第一电压跟随器件的第一输出端的第一端，以及被配置为耦合到电容信号源的第二端的第二端。
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公开(公告)号：US10761186B2
公开(公告)日：2020-09-01
申请号：US15834118
申请日：2017-12-07
发明人： Jochen O. Schrattenecker , Florian Starzer , Oliver Frank , Michael Kropfitsch , Georg Krebelder , Helmut Kollmann , Thomas Sailer
摘要： A radar device comprises a test signal generator including a digital harmonic oscillator that generates a digital oscillator signal with a first spectral component; a first digital-to-analog-converter that generates an analog oscillator signal based on the digital oscillator signal. Furthermore, the radar device comprises at least one radar channel receiving the analog oscillator signal during one or more self-tests.
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