知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

8 条记录 (耗时 0.01 秒)

    Low power operational transconductance amplifier
    3.
    发明授权
    Low power operational transconductance amplifier 有权
    低功耗运算跨导放大器

    公开(公告)号：US09369099B1

    公开(公告)日：2016-06-14

    申请号：US14566539

    申请日：2014-12-10

    申请人： QUALCOMM Incorporated

    发明人： Qubo Zhou

    IPC分类号： H03F3/45 ,  H03M3/00

    CPC分类号： H03F3/45179 ,  H03F1/086 ,  H03F3/45188 ,  H03F2200/45 ,  H03F2203/45024 ,  H03F2203/45034 ,  H03F2203/45058 ,  H03F2203/45194 ,  H03F2203/45296 ,  H03F2203/45631 ,  H03M3/458

    摘要： A method and an apparatus relating to an amplifier (e.g., an operational transconductance amplifier or OTA) are provided. The OTA includes a first node and a second node. The OTA further includes a differential transistor pair for receiving an input. The differential transistor pair is coupled to the first node and the second node. The OTA includes a pair of output nodes for outputting a response to the input. The response at the pair of output nodes includes a first frequency pole. A capacitive element is coupled between the first node and the second node. The response includes a second frequency pole based on the capacitive element. The second frequency pole is at a greater frequency than the first frequency pole.

    摘要翻译： 提供了与放大器（例如，运算跨导放大器或OTA）相关的方法和装置。 OTA包括第一节点和第二节点。 OTA还包括用于接收输入的差分晶体管对。 差分晶体管对耦合到第一节点和第二节点。 OTA包括用于输出对输入的响应的一对输出节点。 输出节点对的响应包括第一个频率极点。 电容元件耦合在第一节点和第二节点之间。 响应包括基于电容元件的第二频率极点。 第二个频率极点处于比第一个频率极点更大的频率。

    Variable gain amplifier with constant input referred third order intercept
    4.
    发明授权
    Variable gain amplifier with constant input referred third order intercept 失效
    具有恒定输入的可变增益放大器称为三阶截距

    公开(公告)号：US07446608B2

    公开(公告)日：2008-11-04

    申请号：US11355673

    申请日：2006-02-16

    申请人： Said E. Abdelli

    发明人： Said E. Abdelli

    IPC分类号： H03F3/45

    CPC分类号： H03F3/45183 ,  H03F2203/45194 ,  H03F2203/45244 ,  H03F2203/45478 ,  H03F2203/45641 ,  H03F2203/45686 ,  H03F2203/45691 ,  H03G1/007

    摘要： Variable gain amplifier (VGA) circuits and methods implemented in such circuits are disclosed. An example VGA circuit includes a differential transistor pair for receiving a differential input signal. The differential transistor pair, in operation, conducts a substantially constant current over a linear operating range of the variable gain amplifier circuit. The VGA circuit also includes a current source that is coupled with the differential transistor pair. The current source, in operation, provides the substantially constant current to the differential transistor pair. The VGA circuit further includes a variable resistance circuit coupled with the differential transistor pair. In operation, a resistance of the variable resistance circuit is adjusted such that a gain of the variable gain amplifier circuit is adjusted. Further, in operation, the VGA circuit produces a differential output signal, the differential output signal being an amplified version of the differential input signal.

    摘要翻译： 公开了在这种电路中实现的可变增益放大器（VGA）电路和方法。 示例VGA电路包括用于接收差分输入信号的差分晶体管对。 在操作中，差分晶体管对在可变增益放大器电路的线性工作范围内传导基本恒定的电流。 VGA电路还包括与差分晶体管对耦合的电流源。 在操作中的电流源向差分晶体管对提供基本恒定的电流。 VGA电路还包括与差分晶体管对耦合的可变电阻电路。 在操作中，调整可变电阻电路的电阻，使得可变增益放大器电路的增益被调整。 此外，在操作中，VGA电路产生差分输出信号，差分输出信号是差分输入信号的放大版本。

    Variable gain amplifier with constant input referred third order intercept
    5.
    发明申请
    Variable gain amplifier with constant input referred third order intercept 失效
    具有恒定输入的可变增益放大器称为三阶截距

    公开(公告)号：US20070188229A1

    公开(公告)日：2007-08-16

    申请号：US11355673

    申请日：2006-02-16

    申请人： Said Abdelli

    发明人： Said Abdelli

    IPC分类号： H03F3/45

    CPC分类号： H03F3/45183 ,  H03F2203/45194 ,  H03F2203/45244 ,  H03F2203/45478 ,  H03F2203/45641 ,  H03F2203/45686 ,  H03F2203/45691 ,  H03G1/007

    摘要： Variable gain amplifier (VGA) circuits and methods implemented in such circuits are disclosed. An example VGA circuit includes a differential transistor pair for receiving a differential input signal. The differential transistor pair, in operation, conducts a substantially constant current over a linear operating range of the variable gain amplifier circuit. The VGA circuit also includes a current source that is coupled with the differential transistor pair. The current source, in operation, provides the substantially constant current to the differential transistor pair. The VGA circuit further includes a variable resistance circuit coupled with the differential transistor pair. In operation, a resistance of the variable resistance circuit is adjusted such that a gain of the variable gain amplifier circuit is adjusted. Further, in operation, the VGA circuit produces a differential output signal, the differential output signal being an amplified version of the differential input signal.

    摘要翻译： 公开了在这种电路中实现的可变增益放大器（VGA）电路和方法。 示例VGA电路包括用于接收差分输入信号的差分晶体管对。 在操作中，差分晶体管对在可变增益放大器电路的线性工作范围内传导基本恒定的电流。 VGA电路还包括与差分晶体管对耦合的电流源。 在操作中的电流源向差分晶体管对提供基本恒定的电流。 VGA电路还包括与差分晶体管对耦合的可变电阻电路。 在操作中，调整可变电阻电路的电阻，使得可变增益放大器电路的增益被调整。 此外，在操作中，VGA电路产生差分输出信号，差分输出信号是差分输入信号的放大版本。

    LOW POWER OPERATIONAL TRANSCONDUCTANCE AMPLIFIER
    6.
    发明申请
    LOW POWER OPERATIONAL TRANSCONDUCTANCE AMPLIFIER 有权
    低功率运行的交叉放大器

    公开(公告)号：US20160173044A1

    公开(公告)日：2016-06-16

    申请号：US14566539

    申请日：2014-12-10

    申请人： QUALCOMM INCORPORATED

    发明人： Qubo ZHOU

    IPC分类号： H03F3/45 ,  H03M3/00

    CPC分类号： H03F3/45179 ,  H03F1/086 ,  H03F3/45188 ,  H03F2200/45 ,  H03F2203/45024 ,  H03F2203/45034 ,  H03F2203/45058 ,  H03F2203/45194 ,  H03F2203/45296 ,  H03F2203/45631 ,  H03M3/458

    摘要： A method and an apparatus relating to an amplifier (e.g., an operational transconductance amplifier or OTA) are provided. The OTA includes a first node and a second node. The OTA further includes a differential transistor pair for receiving an input. The differential transistor pair is coupled to the first node and the second node. The OTA includes a pair of output nodes for outputting a response to the input. The response at the pair of output nodes includes a first frequency pole. A capacitive element is coupled between the first node and the second node. The response includes a second frequency pole based on the capacitive element. The second frequency pole is at a greater frequency than the first frequency pole.

    摘要翻译： 提供了与放大器（例如，运算跨导放大器或OTA）相关的方法和装置。 OTA包括第一节点和第二节点。 OTA还包括用于接收输入的差分晶体管对。 差分晶体管对耦合到第一节点和第二节点。 OTA包括用于输出对输入的响应的一对输出节点。 输出节点对的响应包括第一个频率极点。 电容元件耦合在第一节点和第二节点之间。 响应包括基于电容元件的第二频率极点。 第二个频率极点处于比第一个频率极点更大的频率。

    Fully differential operational amplifier with fast settling time
    8.
    发明授权
    Fully differential operational amplifier with fast settling time 有权
    全差分运算放大器具有快速建立时间

    公开(公告)号：US07265621B1

    公开(公告)日：2007-09-04

    申请号：US11181564

    申请日：2005-07-13

    申请人： Byung-Moo Min

    发明人： Byung-Moo Min

    IPC分类号： H03F3/45

    CPC分类号： H03F3/45188 ,  H03F3/4565 ,  H03F3/45654 ,  H03F2203/45052 ,  H03F2203/45088 ,  H03F2203/45194 ,  H03F2203/45334 ,  H03F2203/45352 ,  H03F2203/45354 ,  H03F2203/45482

    摘要： An operational amplifier includes a pair of differential input transistors, a pair of cascode transistors and a keep-alive circuit. The pair of differential input transistors is connected together at the source terminals and the gate terminals of the input transistors receive a pair of differential input signals. Each cascode transistor is connected to a respective input transistor to form a cascode. The drain terminals of the pair of cascode transistors provide a pair of differential output signals. The keep-alive circuit is connected to provide first and second bias currents to the source terminals of the pair of cascode transistors. In operation, each of the first and second bias currents is a variable current being a function of a voltage at the source terminal of the respective cascode transistor. The first and second bias currents keep the pair of cascode transistors alive during transient overload conditions.

    摘要翻译： 运算放大器包括一对差分输入晶体管，一对共源共栅晶体管和保持电路。 一对差分输入晶体管在源极端子处连接在一起，并且输入晶体管的栅极端子接收一对差分输入信号。 每个共源共栅晶体管连接到相应的输入晶体管以形成共源共栅。 一对共源共栅晶体管的漏极端子提供一对差分输出信号。 保持电路被连接以向该对共源共栅晶体管的源极端提供第一和第二偏置电流。 在操作中，第一和第二偏置电流中的每一个是可变电流，其是相应共源共栅晶体管的源极端处的电压的函数。 在瞬态过载条件下，第一和第二偏置电流保持该对共源共栅晶体管存活。