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1.发明授权公开(公告)号：US11962278B2
公开(公告)日：2024-04-16
申请号：US17318959
申请日：2021-05-12
发明人： Ahmed Abbas Mohamed Helmy , Mehran Bakhshiani , Francesco Gatta , Hasnain Lakdawala , Rahul Karmaker , Shankar Guhados
CPC分类号： H03F3/45475 , H03G3/30 , H03H11/1226 , H03H19/004 , H04B1/0032 , H04B1/0039 , H04B1/0042 , H04B1/0078 , H04B1/1615 , H04B1/18 , H03F2200/129 , H03F2200/165 , H03F2203/45526
摘要： An aspect includes a filtering method including operating a first filter to filter a first input signal to generate a first output signal; operating a second filter to filter a second input signal to generate a second output signal; and selectively coupling at least a portion of the second filter with the first filter to filter a third input signal to generate a third output signal. Another aspect includes a filtering method including operating switching devices to configure a filter with a first set of pole(s); filtering a first input signal to generate a first output signal with the filter configured with the first set of pole(s); operating the switching devices to configure the filter with a second set of poles; and filtering a second input signal to generate a second output signal with the filter configured with the second set of poles.
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2.发明授权公开(公告)号：US11863140B2
公开(公告)日：2024-01-02
申请号：US17318968
申请日：2021-05-12
CPC分类号： H03F3/45475 , H03G3/30 , H03H11/1226 , H03H19/004 , H04B1/0032 , H04B1/0039 , H04B1/0042 , H04B1/0078 , H04B1/1615 , H04B1/18 , H03F2200/129 , H03F2200/165 , H03F2203/45526
摘要： An aspect includes a filtering method including operating a first filter to filter a first input signal to generate a first output signal; operating a second filter to filter a second input signal to generate a second output signal; and merging at least a portion of the second filter with the first filter to filter a third input signal to generate a third output signal. Another aspect includes a filtering method including operating switching devices to configure a filter with a first set of pole(s); filtering a first input signal to generate a first output signal with the filter configured with the first set of pole(s); operating the switching devices to configure the filter with a second set of poles; and filtering a second input signal to generate a second output signal with the filter configured with the second set of poles.
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公开(公告)号：US11695391B2
公开(公告)日：2023-07-04
申请号：US17467116
申请日：2021-09-03
发明人： Makoto Morita
IPC分类号： H03H11/12
CPC分类号： H03H11/1226
摘要： According to one embodiment, in a biquad filter, an output terminal of a first integrator is connected to an input terminal in a negative pole side of a second integrator, an output terminal of the first integrator is connected to a first input terminal in a negative pole side of an adder through the inversion amplifier, an output terminal of the second integrator is connected to a second input terminal in the negative pole side of the adder, an input terminal to which an input signal is input is connected to a third input terminal in the negative side of the adder, and an output terminal of the adder is connected to an input terminal in a negative pole side of the first integrator.
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公开(公告)号：US3955150A
公开(公告)日：1976-05-04
申请号：US541177
申请日：1975-01-15
CPC分类号： H03H11/1269 , B21K1/704 , H03H11/1226 , Y02P70/137
摘要： An operational amplifier-type active filter in which the only capacitor in the circuit is the compensating capacitance of the operational amplifiers, the various feedback and coupling elements being essentially solely resistive.
摘要翻译： 运算放大器型有源滤波器，其中电路中的唯一电容器是运算放大器的补偿电容，各种反馈和耦合元件基本上仅仅是电阻的。
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公开(公告)号：US08120417B2
公开(公告)日：2012-02-21
申请号：US12507103
申请日：2009-07-22
IPC分类号： H03K5/00
CPC分类号： H03F3/45475 , H03F3/45183 , H03F3/45632 , H03F2203/45008 , H03F2203/45138 , H03F2203/45526 , H03H11/1226 , H03H11/1256 , H03H11/1269
摘要： A filter circuit includes a differential amplifier circuit to provide a number of poles including a dominant pole, and a feedback circuit to feed a portion of an output of the differential amplifier circuit to an input of the differential amplifier circuit. The feedback circuit includes a feedback resistor and a feedback capacitor to provide a controllable increase in an order of a transfer function of the filter circuit along with non-dominant poles of the differential amplifier circuit coupled in parallel with the feedback resistor. Coefficients of a transfer function of the differential amplifier circuit are forced to substantially depend solely on one or more of a plurality of passive circuit elements, the feedback resistor, and the feedback capacitor to control a dependence of the transfer function of the filter circuit on a gain of the differential amplifier circuit and poles of the differential amplifier circuit.
摘要翻译： 滤波器电路包括提供包括主极的多个极的差分放大器电路和用于将差分放大器电路的输出的一部分馈送到差分放大器电路的输入端的反馈电路。 反馈电路包括反馈电阻器和反馈电容器，以提供滤波器电路的传递函数的顺序的可控增加以及与反馈电阻器并联耦合的差分放大器电路的非主导极。 迫使差分放大器电路的传递函数的系数仅基本上取决于多个无源电路元件，反馈电阻器和反馈电容器中的一个或多个，以控制滤波器电路的传递函数对 差分放大器电路的增益和差分放大器电路的极点。
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公开(公告)号：US20110012678A1
公开(公告)日：2011-01-20
申请号：US12507103
申请日：2009-07-22
IPC分类号： H03F3/45
CPC分类号： H03F3/45475 , H03F3/45183 , H03F3/45632 , H03F2203/45008 , H03F2203/45138 , H03F2203/45526 , H03H11/1226 , H03H11/1256 , H03H11/1269
摘要： A filter circuit includes a differential amplifier circuit to provide a number of poles including a dominant pole, and a feedback circuit to feed a portion of an output of the differential amplifier circuit to an input of the differential amplifier circuit. The feedback circuit includes a feedback resistor and a feedback capacitor to provide a controllable increase in an order of a transfer function of the filter circuit along with non-dominant poles of the differential amplifier circuit coupled in parallel with the feedback resistor. Coefficients of a transfer function of the differential amplifier circuit are forced to substantially depend solely on one or more of a plurality of passive circuit elements, the feedback resistor, and the feedback capacitor to control a dependence of the transfer function of the filter circuit on a gain of the differential amplifier circuit and poles of the differential amplifier circuit.
摘要翻译： 滤波器电路包括提供包括主极的多个极的差分放大器电路和用于将差分放大器电路的输出的一部分馈送到差分放大器电路的输入端的反馈电路。 反馈电路包括反馈电阻器和反馈电容器，以提供滤波器电路的传递函数的顺序的可控增加以及与反馈电阻器并联耦合的差分放大器电路的非主导极。 迫使差分放大器电路的传递函数的系数仅基本上取决于多个无源电路元件，反馈电阻器和反馈电容器中的一个或多个，以控制滤波器电路的传递函数对 差分放大器电路的增益和差分放大器电路的极点。
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