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1. 发明授权

US11863133B2 Trans-impedance amplifier for ultrasound device and related apparatus and methods 有权
公开(公告)号：US11863133B2
公开(公告)日：2024-01-02
申请号：US17331538
申请日：2021-05-26
申请人： BFLY OPERATIONS, INC.
发明人： Kailiang Chen , Keith G. Fife , Nevada J. Sanchez , Andrew J. Casper , Tyler S. Ralston
IPC分类号： H03F3/16 , H03F1/08 , H03F3/45 , G01S7/52 , A61B5/00 , A61B8/00 , A61B8/08
CPC分类号： H03F3/16 , A61B5/6801 , A61B8/4444 , G01S7/52025 , H03F1/086 , H03F3/45183 , A61B8/5207 , H03F2200/408 , H03F2200/555 , H03F2203/45471 , H03F2203/45504 , H03F2203/45631 , H03F2203/45634 , H03F2203/45646 , H03F2203/45648 , H03F2203/45674 , H03F2203/45686 , H03F2203/45692 , H03F2203/45726
摘要： A variable current trans-impedance amplifier (TIA) for an ultrasound device is described. The TIA may be coupled to an ultrasonic transducer to amplify an output signal of the ultrasonic transducer representing an ultrasound signal received by the ultrasonic transducer. During acquisition of the ultrasound signal by the ultrasonic transducer, one or more current sources in the TIA may be varied.

2. 发明授权

US09300257B1 High gain, high slew rate amplifier 有权
标题翻译：高增益，高压摆率放大器
公开(公告)号：US09300257B1
公开(公告)日：2016-03-29
申请号：US14504540
申请日：2014-10-02
申请人： ANALOG DEVICES TECHNOLOGY
发明人： Vinayak Mukund Kulkarni
IPC分类号： H03F3/45 , H03F3/16
CPC分类号： H03F3/45183 , H03F2203/45248 , H03F2203/45626 , H03F2203/45644 , H03F2203/45646
摘要： In an example embodiment, an amplifier having high gain and high slew rate is provided and includes a pair of input transistors to which input voltage is applied, a pair of diode-connected loads coupled to the input transistors, at least one pair of current sources coupled to the diode-connected loads, and a bias control configured to turn off the at least one pair of current sources to enable high slew rate for the amplifier and to turn on the at least one pair of current sources to enable high gain for the amplifier. In specific embodiments, the current sources include transistors, the bias control controls a bias voltage to the current sources, and the bias voltage is driven to the supply voltage (VDD) to turn off the current sources.
摘要翻译：在示例实施例中，提供了具有高增益和高转换速率的放大器，并且包括一对输入电压施加到的输入晶体管，耦合到输入晶体管的一对二极管连接的负载，至少一对电流源耦合到所述二极管连接的负载，以及偏置控制，被配置为关断所述至少一对电流源，以使所述放大器能够实现高转换速率，并且接通所述至少一对电流源，以使所述至少一对电流源能够获得高增益放大器在具体实施例中，电流源包括晶体管，偏置控制控制到电流源的偏置电压，偏置电压被驱动到电源电压（VDD）以截止电流源。

3. 发明申请

US20150146884A1 CIRCUIT FOR SUPPRESSING AUDIO OUTPUT NOISE AND AUDIO OUTPUT CIRCUIT 有权
标题翻译：用于抑制音频输出噪声和音频输出电路的电路
公开(公告)号：US20150146884A1
公开(公告)日：2015-05-28
申请号：US14452685
申请日：2014-08-06
申请人： Spreadtrum Communications (Shanghai) Co., Ltd.
发明人： Xun ZHANG
IPC分类号： H04R3/00
CPC分类号： H04R3/002 , H03F1/0277 , H03F1/26 , H03F1/305 , H03F3/181 , H03F3/20 , H03F3/211 , H03F3/2171 , H03F3/2178 , H03F3/45179 , H03F3/45183 , H03F3/72 , H03F2203/21142 , H03F2203/21175 , H03F2203/45361 , H03F2203/45371 , H03F2203/45396 , H03F2203/45646 , H03F2203/45648 , H03F2203/45726 , H04R3/02
摘要： A circuit for suppressing audio output noise and an audio output circuit are provided. The circuit for suppressing audio output noise includes: a detecting circuit, configured to detect output voltages of output stages of an audio power amplifier; a control circuit, configured to output at least one control signal, the control signal is related to detection results of the detecting circuit; and a compensating circuit, configured to compensate at least one output stage of the audio power amplifier which includes a differential circuit based on the at least one control signal output by the control circuit, to make parameters of the differential circuit symmetrical or approach symmetrical. Based on detection results of the output stage voltages, the differential circuit in the output stages of the audio power amplifier is compensated. The circuit for suppressing audio output noise has a wider application scope and it is easy to design the circuit.
摘要翻译：提供用于抑制音频输出噪声的电路和音频输出电路。用于抑制音频输出噪声的电路包括：检测电路，被配置为检测音频功率放大器的输出级的输出电压; 控制电路，被配置为输出至少一个控制信号，所述控制信号与所述检测电路的检测结果有关; 以及补偿电路，被配置为基于由所述控制电路输出的所述至少一个控制信号来补偿所述音频功率放大器的至少一个输出级，所述至少一个输出级包括差分电路，以使所述差分电路的参数对称或接近对称。基于输出级电压的检测结果，对音频功率放大器的输出级中的差分电路进行补偿。用于抑制音频输出噪声的电路具有更广泛的应用范围，并且易于设计电路。

4. 发明授权

US08710869B2 High-speed comparator with asymmetric frequency response 有权
标题翻译：具有不对称频率响应的高速比较器
公开(公告)号：US08710869B2
公开(公告)日：2014-04-29
申请号：US10422238
申请日：2003-04-23
申请人： Peter Hazucha , Tsung-Hao Chen , Tanay Karnik , Chung-Ping Chen
发明人： Peter Hazucha , Tsung-Hao Chen , Tanay Karnik , Chung-Ping Chen
IPC分类号： H03K5/22 , H03K5/24
CPC分类号： H03K5/2481 , H03F3/45183 , H03F2203/45544 , H03F2203/45646
摘要： A comparator to provide an output voltage indicative of comparing an input voltage with a reference voltage, where the comparator has an asymmetric frequency response. With an asymmetric frequency response, the bandwidth of the input voltage may be greater than the bandwidth of the reference voltage. A comparator includes a differential pair of transistors coupled to a current mirror and biased by a current source, where in one embodiment, a capacitor shunts the sources of the differential pair. In a second embodiment, a capacitor couples the input voltage port to the gates of the current mirror transistors. In a third embodiment, the comparator utilizes both capacitors of the first and second embodiments.
摘要翻译：比较器，用于提供指示将输入电压与参考电压进行比较的输出电压，其中比较器具有不对称的频率响应。对于非对称频率响应，输入电压的带宽可能大于参考电压的带宽。比较器包括耦合到电流镜并由电流源偏置的晶体管的差分对，其中在一个实施例中，电容器分流差分对的源极。在第二实施例中，电容器将输入电压端口耦合到电流镜晶体管的栅极。在第三实施例中，比较器利用了第一和第二实施例的两个电容器。

5. 发明授权

US08648660B2 Amplifier with non-linear current mirror 有权
标题翻译：具有非线性电流镜的放大器
公开(公告)号：US08648660B2
公开(公告)日：2014-02-11
申请号：US13343521
申请日：2012-01-04
申请人： Carlo Fiocchi
发明人： Carlo Fiocchi
IPC分类号： H03F3/45
CPC分类号： H03F3/45183 , G05F3/262 , H03F1/0266 , H03F3/3016 , H03F3/45179 , H03F2200/24 , H03F2200/411 , H03F2200/453 , H03F2200/456 , H03F2203/30006 , H03F2203/45248 , H03F2203/45366 , H03F2203/45466 , H03F2203/45511 , H03F2203/45626 , H03F2203/45646 , H03F2203/45648 , H03F2203/45686 , H03F2203/45696 , H03F2203/45702 , H03G1/0029 , H03G1/0035
摘要： An amplifier with a non-linear current mirror comprises an amplification stage having an input terminal for an input signal as well as an output stage coupled to the amplification stage by a current mirror stage. The current mirror stage comprises at least one mirror transistor coupled to the amplification stage and at least one output transistor coupled to the output stage. The amplifier comprises two variable resistive elements, each of them connected in series to one of the mirror transistor and the output transistor. A tuning stage is adapted to tune the variable resistive elements in response to the input signal.
摘要翻译：具有非线性电流镜的放大器包括具有用于输入信号的输入端的放大级以及通过电流镜级耦合到放大级的输出级。电流镜级包括耦合到放大级的至少一个反射镜晶体管和耦合到输出级的至少一个输出晶体管。放大器包括两个可变电阻元件，每个可变电阻元件与镜像晶体管和输出晶体管中的一个串联连接。调谐级适于响应于输入信号调谐可变电阻元件。

6. 发明授权

US08476977B2 LCD driving circuit using operational amplifier and LCD display apparatus using the same 失效
标题翻译： LCD驱动电路采用运算放大器和LCD显示装置
公开(公告)号：US08476977B2
公开(公告)日：2013-07-02
申请号：US13613248
申请日：2012-09-13
申请人： Kouichi Nishimura
发明人： Kouichi Nishimura
IPC分类号： H03F3/45
CPC分类号： H03F3/45475 , G09G3/3614 , G09G3/3688 , H03F3/3022 , H03F3/45183 , H03F3/4521 , H03F2200/411 , H03F2203/45562 , H03F2203/45614 , H03F2203/45616 , H03F2203/45644 , H03F2203/45646 , H03F2203/45648 , H03F2203/45651 , H03F2203/45724 , H03F2203/45726
摘要： In an operational amplifier, a control unit switches an operation mode between first and second operation modes. A first output drive stage circuit section is configured to amplify a first input signal differentially-amplified by a first or a second input differential stage circuit section to output as a first drive voltage, similar to a second output drive stage circuit section. First and second power supplies: supply voltages in a first voltage range to the first differential stage circuit section and the first output drive stage circuit section in the first operation mode, supply voltages in the first voltage range to the second differential stage circuit section and the first output drive stage circuit section in the second operation mode, similar to third and fourth power supplies. The drive voltage on each of the first and second output nodes is fed back.
摘要翻译：在运算放大器中，控制单元在第一和第二操作模式之间切换操作模式。第一输出驱动级电路部分被配置为放大由第一或第二输入差分级电路部分差分放大的第一输入信号，以类似于第二输出驱动级电路部分作为第一驱动电压输出。第一和第二电源：在第一操作模式中，将第一电压范围内的电压提供给第一差分级电路部分和第一输出驱动级电路部分，将第一电压范围内的电压提供给第二差分级电路部分，第一输出驱动级电路部分处于第二操作模式，类似于第三和第四电源。第一和第二输出节点中的每一个上的驱动电压被反馈。

7. 发明授权

US08324972B2 Front-end circuit of low supply-voltage memory interface receiver 有权
标题翻译：低电源电压存储器接口的前端电路
公开(公告)号：US08324972B2
公开(公告)日：2012-12-04
申请号：US13077600
申请日：2011-03-31
申请人： Ying-Yu Hsu
发明人： Ying-Yu Hsu
IPC分类号： H03F3/04
CPC分类号： H03F3/45179 , H03F2203/45506 , H03F2203/45646
摘要： A circuit includes a reference voltage generator configured to generate a first reference voltage and a second reference voltage, wherein the first reference voltage is higher than a half of a positive power supply voltage, and the second reference voltage is lower than the half of the positive power supply voltage. An n-type differential amplifier includes a first and a second NMOS transistor, wherein a gate of the first NMOS transistor is coupled to an input node, and a gate of the second NMOS transistor is configured to receive the first reference voltage. A p-type differential amplifier is operated by the positive supply voltage and includes a first and a second PMOS transistor. A gate of the first PMOS transistor is coupled to the input node, and a gate of the second PMOS transistor is configured to receive the second reference voltage.
摘要翻译：电路包括：参考电压发生器，被配置为产生第一参考电压和第二参考电压，其中所述第一参考电压高于正电源电压的一半，并且所述第二参考电压低于所述正电压的一半电源电压。 n型差分放大器包括第一和第二NMOS晶体管，其中第一NMOS晶体管的栅极耦合到输入节点，并且第二NMOS晶体管的栅极被配置为接收第一参考电压。 p型差分放大器由正电源电压工作，并且包括第一和第二PMOS晶体管。第一PMOS晶体管的栅极耦合到输入节点，并且第二PMOS晶体管的栅极被配置为接收第二参考电压。

8. 发明申请

US20120212259A1 COMPARATOR OF A DIFFERENCE OF INPUT VOLTAGES WITH AT LEAST A THRESHOLD 审中-公开
标题翻译：输入电压差异至少达到阈值的比较器
公开(公告)号：US20120212259A1
公开(公告)日：2012-08-23
申请号：US13398694
申请日：2012-02-16
申请人： Alberto Riva , Giorgio Oddone , Domenico Attianese
发明人： Alberto Riva , Giorgio Oddone , Domenico Attianese
IPC分类号： H03K5/22
CPC分类号： H03K5/082 , G01R19/10 , G01R19/1659 , H03F3/45179 , H03F3/45183 , H03F2203/45394 , H03F2203/45498 , H03F2203/45646 , H03F2203/45702 , H03K5/2481
摘要： A comparator is configured to generate an output voltage representing the comparison between the absolute value of the difference between two input voltages with an adjustable reference voltage. The comparator includes an input differential amplifier, receiving the two input voltages and connected to an active load network controlled by a control voltage, a control circuit that generates the control voltage representing the adjustable reference voltage, and an output stage having a logic circuit configured to produce the output voltage of the comparator as a logic combination of the output voltages of the differential amplifier.
摘要翻译：比较器被配置为产生表示两个输入电压之间的差的绝对值与可调参考电压之间的比较的输出电压。比较器包括输入差分放大器，接收两个输入电压并连接到由控制电压控制的有源负载网络，产生表示可调参考电压的控制电压的控制电路，以及具有逻辑电路的输出级，该逻辑电路被配置为产生比较器的输出电压作为差分放大器的输出电压的逻辑组合。

9. 发明申请

US20120206202A1 GAIN ENHANCEMENT CIRCUIT AND METHOD 有权
标题翻译：增益增益电路和方法
公开(公告)号：US20120206202A1
公开(公告)日：2012-08-16
申请号：US13396123
申请日：2012-02-14
申请人： Yannick De Wit , Ishwar Chandra Mudegowdar , Genis Chapinal
发明人： Yannick De Wit , Ishwar Chandra Mudegowdar , Genis Chapinal
IPC分类号： H03G3/20 , H03F3/45
CPC分类号： H03F3/45179 , H03F2200/261 , H03F2203/45512 , H03F2203/45646
摘要： In accordance with an embodiment, a gain enhancement circuit includes an amplifier having an input terminal, a transistor coupled to the input terminal and a capacitance dynamically coupled to another input terminal of the amplifier by a switch, wherein the capacitance is a parasitic element of the transistor.
摘要翻译：根据实施例，增益增强电路包括放大器，其具有输入端子，耦合到输入端子的晶体管和通过开关动态地耦合到放大器的另一个输入端子的电容，其中电容是寄生元件晶体管。

10. 发明申请

US20120019323A1 CURRENT-MODE AMPLIFIER 有权
公开(公告)号：US20120019323A1
公开(公告)日：2012-01-26
申请号：US12855713
申请日：2010-08-13
申请人： Horng-Yuan Shih , Wei-Hsien Chen , Kai-Cheung Juang
发明人： Horng-Yuan Shih , Wei-Hsien Chen , Kai-Cheung Juang
IPC分类号： H03F3/45 , H03F3/04
CPC分类号： H03F3/45183 , H03F1/0277 , H03F3/189 , H03F3/193 , H03F3/211 , H03F3/72 , H03F2200/27 , H03F2200/294 , H03F2200/36 , H03F2200/405 , H03F2200/91 , H03F2203/21142 , H03F2203/45394 , H03F2203/45646 , H03F2203/7206 , H03F2203/7236 , H03G3/3078
摘要： A current-mode amplifier including an input stage, a feedback circuit and an output stage is provided. The input stage has an input terminal for receiving an input current of the current-mode amplifier. The input stage generates a corresponding inner current in accordance with the input current and a feedback current. The feedback circuit is connected to the input stage. The feedback circuit generates the corresponding feedback current in accordance with the inner current of the input stage. An input terminal of the output stage is connected to an output terminal of the input stage. An output terminal of the output stage serves as an output terminal of the current-mode amplifier.

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