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13 条记录 (耗时 0.007 秒)

    System and method for a startup circuit for a differential CMOS amplifier
    3.
    发明公开
    System and method for a startup circuit for a differential CMOS amplifier 有权
    的系统和方法的CMOS差动放大器的起动电路

    公开(公告)号：EP1347571A3

    公开(公告)日：2005-02-09

    申请号：EP03001572.1

    申请日：2003-01-23

    申请人： Broadcom Corporation

    发明人： Sobel, David A.

    IPC分类号： H03F1/30 ,  H03F3/45

    CPC分类号： H03F3/45739 ,  H03F3/45192 ,  H03F3/4539 ,  H03F2203/45521 ,  H03F2203/45594 ,  H03F2203/45601 ,  H03F2203/45616 ,  H03F2203/45698 ,  H03F2203/45726 ,  H03G1/0088

    摘要： A system is provided for correcting start-up deficiencies in an amplifier. The system includes a comparing device configured to (i) receive a second circuit node voltage and a reference voltage as inputs, (ii) compare the received second circuit node voltage and the reference voltage, and (iii) produce a compensating voltage signal based upon the comparison. Next, an active device has a control terminal connected to an output port of the comparing device and is configured to receive the compensating voltage signal. The active device also includes an output terminal connected to the control terminal of the second active device, and a common terminal connected to a first circuit node. Another active device has a control terminal connected to the output port of the comparing device and is configured to receive the compensating voltage signal. The other active device also has an output terminal connected to the control terminal of the first active device, and a common terminal connected to the first circuit node.

    System and method for a programmable gain amplifier
    4.
    发明公开
    System and method for a programmable gain amplifier 有权
    系统和方法，用于可编程放大器

    公开(公告)号：EP1331732A3

    公开(公告)日：2005-02-16

    申请号：EP03001574.7

    申请日：2003-01-23

    申请人： Broadcom Corporation

    发明人： Sobel, David A.

    IPC分类号： H03G3/00

    CPC分类号： H03G1/0088 ,  H03F3/45192 ,  H03F3/4539 ,  H03F3/45739 ,  H03F3/45995 ,  H03F2203/45521 ,  H03F2203/45594 ,  H03F2203/45601 ,  H03F2203/45616 ,  H03F2203/45698 ,  H03F2203/45726

    摘要： Provided is system for an improved programmable gain amplifier (PGA). The system includes an amplifier and a first gain control mechanism. The first gain control mechanism includes a circuit input port and is positioned along a feedback path of the amplifier. The first gain control mechanism is configured to (i) receive an input signal and (ii) moderate gains applied to the received input signal, the applied gains including gain values of greater than or equal to one. A second gain control mechanism is coupled to the first gain control mechanism and is integrated with a function of the amplifier. The second gain control mechanism (i) provides gain values of less than one and (ii) decreases a feedback factor of the amplifier when the gain values are provided having values of less than one.

    System and method for a startup circuit for a differential CMOS amplifier
    10.
    发明公开
    System and method for a startup circuit for a differential CMOS amplifier 有权
    System und Verfahrenfüreine Anlaufschaltung eines CMOSDifferenzverstärkers

    公开(公告)号：EP1347571A2

    公开(公告)日：2003-09-24

    申请号：EP03001572.1

    申请日：2003-01-23

    申请人： Broadcom Corporation

    发明人： Sobel, David A.

    IPC分类号： H03F1/30

    CPC分类号： H03F3/45739 ,  H03F3/45192 ,  H03F3/4539 ,  H03F2203/45521 ,  H03F2203/45594 ,  H03F2203/45601 ,  H03F2203/45616 ,  H03F2203/45698 ,  H03F2203/45726 ,  H03G1/0088

    摘要： A system is provided for correcting start-up deficiencies in an amplifier. The system includes a comparing device configured to (i) receive a second circuit node voltage and a reference voltage as inputs, (ii) compare the received second circuit node voltage and the reference voltage, and (iii) produce a compensating voltage signal based upon the comparison. Next, an active device has a control terminal connected to an output port of the comparing device and is configured to receive the compensating voltage signal. The active device also includes an output terminal connected to the control terminal of the second active device, and a common terminal connected to a first circuit node. Another active device has a control terminal connected to the output port of the comparing device and is configured to receive the compensating voltage signal. The other active device also has an output terminal connected to the control terminal of the first active device, and a common terminal connected to the first circuit node.

    摘要翻译： 提供了用于校正放大器的启动缺陷的系统。 该系统包括比较装置，其被配置为（i）接收第二电路节点电压和参考电压作为输入，（ii）比较所接收的第二电路节点电压和参考电压，以及（iii）产生补偿电压信号，基于 比较。 接下来，有源装置具有连接到比较装置的输出端口的控制端子，并且被配置为接收补偿电压信号。 有源器件还包括连接到第二有源器件的控制端的输出端和连接到第一电路节点的公共端。 另一个有源器件具有连接到比较器件的输出端口的控制端子并被配置为接收补偿电压信号。 另一个有源器件还具有连接到第一有源器件的控制端子的输出端子和连接到第一电路节点的公共端子。