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公开(公告)号：US20130207718A1
公开(公告)日：2013-08-15
申请号：US13758028
申请日：2013-02-04
Applicant: MEDIATEK INC.
Inventor： Yu-Hsin LIN , Hung-Chieh TSAI , Chi-Lun LO , Chen-Yen HO
IPC: H03H11/12
CPC classification number: H03H11/1204 , H03H11/1252 , H03H11/126
Abstract: A filter is provided. The filter receives an input signal and generates an output signal according to the input signal. The filter includes an input network, a high-pass network, and an operational circuit. The first input network provides a first normal path for the input signal to generate a first normal signal. The first high-pass network provides a first high-pass path for the input signal to generate a first high-pass signal. The operational circuit has first and second input terminals. The polarity of the second input terminal is inverse to that of the first input terminal. The operational circuit receives the first normal signal by the first input terminal and the first high-pass signal by the second input terminal such that a subtraction operation is performed on the first normal signal and the first high-pass filter to accomplish a low-pass filtering operation for generating the output signal.
Abstract translation: 提供了一个过滤器。 滤波器接收输入信号，并根据输入信号产生输出信号。 滤波器包括输入网络，高通网络和操作电路。 第一输入网络为输入信号提供第一正常路径以产生第一正常信号。 第一高通网络为输入信号提供第一高通路径以产生第一高通信号。 该操作电路具有第一和第二输入端。 第二输入端子的极性与第一输入端子的极性相反。 操作电路由第一输入端接收第一正常信号和由第二输入端接收第一高通信号，使得对第一正常信号和第一高通滤波器执行减法运算以完成低通 用于产生输出信号的滤波操作。
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公开(公告)号：US20130214951A1
公开(公告)日：2013-08-22
申请号：US13760379
申请日：2013-02-06
Applicant: MediaTek Inc.
Inventor： Chen-Yen HO , Chi-Lun LO , Hung-Chieh TSAI , Yu-Hsin LIN
IPC: H03M3/00
Abstract: A sigma-delta modulator is provided for generating a digital output signal. The sigma-delta modulator includes a multi-stage loop filter, a quantizer, and a digital-to-analog converter. The multi-stage loop filter receives an analog input signal and generates an integrated output signal according to the analog input signal. Each stage of the multi-stage loop filter includes a feedback network. The quantizer receives the integrated output signal and quantizes the integrated output signal to generate the digital output signal. The digital-to-analog converter receives the digital output signal and converts the digital output signal to a compensation signal. The digital-to-analog converter provides the compensation signal to a plurality of internal nodes in the feedback network of the last stage of the multi-stage loop filter.
Abstract translation: 提供Σ-Δ调制器用于产生数字输出信号。 Σ-Δ调制器包括多级环路滤波器，量化器和数模转换器。 多级环路滤波器接收模拟输入信号，并根据模拟输入信号产生积分输出信号。 多级环路滤波器的每一级都包括反馈网络。 量化器接收积分输出信号并量化积分输出信号以产生数字输出信号。 数模转换器接收数字输出信号并将数字输出信号转换成补偿信号。 数模转换器向多级环路滤波器的最后级的反馈网络中的多个内部节点提供补偿信号。
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Patent Agency Ranking
3.发明申请公开(公告)号：US20150180420A1
公开(公告)日：2015-06-25
申请号：US14643240
申请日：2015-03-10
Applicant: MediaTek Inc.
Inventor： Chen-Yen HO , Chi-Lun LO , Hung-Chieh TSAI , Yu-Hsin LIN
CPC classification number: H03F1/0205 , H03F3/265 , H03F3/30 , H03F3/3023 , H03F3/45071 , H03F3/45179 , H03F3/45183 , H03F3/45475 , H03F2200/18 , H03F2203/30021 , H03F2203/30033 , H03F2203/45022 , H03F2203/45134 , H03F2203/45138 , H03M3/39 , H03M3/50
Abstract: An amplifier includes a front-end gain stage and an AC-coupled push-pull output stage. The AC-coupled push-pull output stage includes a first transistor, having a source, a drain and a gate, wherein the source of the first transistor is coupled to a first voltage level. The AC-coupled push-pull output stage further includes a second transistor, having a source, a drain and a gate, wherein the source of the second transistor is coupled to a second voltage level, the gate of the second transistor is coupled to the front-end gain stage, and the drain of the second transistor is coupled to the drain of the first transistor to form an output terminal of the amplifier. Further, the AC-coupled push-pull output stage includes an AC-coupled capacitor, which is a passive two terminal electrical component coupled between the front-end gain stage and the gate of the first transistor.
Abstract translation: 放大器包括前端增益级和AC耦合推挽输出级。 AC耦合推挽输出级包括具有源极，漏极和栅极的第一晶体管，其中第一晶体管的源极耦合到第一电压电平。 AC耦合推挽输出级还包括具有源极，漏极和栅极的第二晶体管，其中第二晶体管的源极耦合到第二电压电平，第二晶体管的栅极耦合到 前端增益级，第二晶体管的漏极耦合到第一晶体管的漏极，以形成放大器的输出端。 此外，AC耦合推挽输出级包括AC耦合电容器，其是耦合在前端增益级与第一晶体管的栅极之间的无源双端电气部件。
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4.发明申请公开(公告)号：US20140103999A1
公开(公告)日：2014-04-17
申请号：US14134944
申请日：2013-12-19
Applicant: MediaTek Inc.
Inventor： Chen-Yen HO , Chi-Lun LO , Hung-Chieh TSAI , Yu-Hsin LIN
CPC classification number: H03F1/0205 , H03F3/265 , H03F3/30 , H03F3/3023 , H03F3/45071 , H03F3/45179 , H03F3/45183 , H03F3/45475 , H03F2200/18 , H03F2203/30021 , H03F2203/30033 , H03F2203/45022 , H03F2203/45134 , H03F2203/45138 , H03M3/39 , H03M3/50
Abstract: An amplifier includes a front-end gain stage and an AC-coupled push-pull output stage. The AC-coupled push-pull output stage includes a first transistor, having a source, a drain and a gate, wherein the source of the first transistor is coupled to a first voltage level; a second transistor, having a source, a drain and a gate, wherein the source of the second transistor is coupled to a second voltage level, the gate of the second transistor is coupled to the front-end gain stage, and the drain of the second transistor is coupled to the drain of the first transistor to form an output terminal of the amplifier; an AC-coupled capacitor, which is a passive two terminal electrical component coupled between the front-end gain stage and the gate of the first transistor;and a resistance component, coupling the gate of the first transistor to a bias voltage level.
Abstract translation: 放大器包括前端增益级和AC耦合推挽输出级。 AC耦合推挽输出级包括具有源极，漏极和栅极的第一晶体管，其中第一晶体管的源极耦合到第一电压电平; 具有源极，漏极和栅极的第二晶体管，其中所述第二晶体管的源极耦合到第二电压电平，所述第二晶体管的栅极耦合到所述前端增益级，并且所述漏极 第二晶体管耦合到第一晶体管的漏极，以形成放大器的输出端; AC耦合电容器，其是耦合在前端增益级与第一晶体管的栅极之间的无源双端电气元件; 以及电阻分量，将第一晶体管的栅极耦合到偏置电压电平。
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公开(公告)号：US20240223142A1
公开(公告)日：2024-07-04
申请号：US18326136
申请日：2023-05-31
Applicant: MEDIATEK INC.
Inventor： Wan-Ling WU , Hung-Chieh TSAI
IPC: H03F3/45
CPC classification number: H03F3/45475 , H03F3/45273 , H03F2200/471
Abstract: A low-cost and high-accuracy threshold voltage (Vth) sensor is shown. In addition to a current mirror implemented by an operational amplifier and two metal-oxide-semiconductor field-effect transistors (MOSFETs), the Vth sensor uses an active device and a diode-connected MOSFET. The active device is provided to determine a constant current that is mirrored from the first MOSFET to the second MOSFET of the current mirror. The diode-connected MOSFET is coupled between the drain terminal of the second MOSFET and the ground terminal. The constant current flows through the diode-connected MOSFET to generate an output voltage that contains information about a threshold voltage (Vth) of a MOSFET.
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公开(公告)号：US20140159930A1
公开(公告)日：2014-06-12
申请号：US14097451
申请日：2013-12-05
Applicant: MediaTek Inc.
Inventor： Chen-Yen HO , Hung-Chieh TSAI , Yu-Hsin LIN
IPC: H03M3/00
Abstract: A sigma-delta modulator is provided for generating a digital output signal. The sigma-delta modulator is used to generate a digital output signal. The sigma-delta modulator includes a multi-stage loop filter and a quantizer. The multi-stage loop filter receives an analog input signal and generates an integrated output signal according to the analog input signal. The quantizer is coupled to the multi-stage loop filter. The quantizer receives the integrated output signal and quantizes the integrated output signal to generate the digital output signal. Different feed-forward paths of the sigma-delta modulator are available for different frequency bands.
Abstract translation: 提供Σ-Δ调制器用于产生数字输出信号。 Σ-Δ调制器用于产生数字输出信号。 Σ-Δ调制器包括多级环路滤波器和量化器。 多级环路滤波器接收模拟输入信号，并根据模拟输入信号产生积分输出信号。 量化器耦合到多级环路滤波器。 量化器接收积分输出信号并量化积分输出信号以产生数字输出信号。 Σ-Δ调制器的不同前馈路径可用于不同的频带。
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公开(公告)号：US20150028951A1
公开(公告)日：2015-01-29
申请号：US14513387
申请日：2014-10-14
Applicant: MediaTek Inc.
Inventor： Hung-Chieh TSAI , Chi-Lun LO , Chen-Yen HO , Yu-Hsin LIN
CPC classification number: H03F3/45179 , H03F1/14 , H03F1/3211 , H03F1/483 , H03F3/193 , H03F3/3023 , H03F3/45 , H03F3/45076 , H03F3/45188 , H03F2200/36 , H03F2203/45222 , H03F2203/45521 , H03F2203/45526 , H03F2203/45626
Abstract: An implementation of an operational amplifier circuit includes a first stage amplifier circuit, a second stage amplifier circuit and a first feedforward circuit. The first stage amplifier circuit is coupled to a first input node for receiving a first input signal and amplifying the first input signal to generate a first amplified signal. The second stage amplifier circuit is coupled to the first stage amplifier circuit for receiving the first amplified signal and amplifying the first amplified signal to generate a first output signal at a first output node. The first feedforward circuit is coupled between the first input node and the second stage amplifier circuit for feeding the first input signal forward to the second stage amplifier circuit.
Abstract translation: 运算放大器电路的实现包括第一级放大器电路，第二级放大器电路和第一前馈电路。 第一级放大器电路耦合到第一输入节点，用于接收第一输入信号并放大第一输入信号以产生第一放大信号。 第二级放大器电路耦合到第一级放大器电路，用于接收第一放大信号并放大第一放大信号以在第一输出节点产生第一输出信号。 第一前馈电路耦合在第一输入节点和第二级放大器电路之间，用于将第一输入信号向前馈送到第二级放大器电路。
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