Peak detector circuit
    1.
    发明授权
    Peak detector circuit 失效
    峰值检测电路

    公开(公告)号:US5969545A

    公开(公告)日:1999-10-19

    申请号:US12745

    申请日:1998-01-23

    IPC分类号: G01R19/04 G01R19/00

    CPC分类号: G01R19/04

    摘要: A peak detector circuit (100) includes an output transconductance amplifier (102), a current rectifier (104) and an averaging circuit (108). The current rectifier includes an amplifier (115) which reduces input impedance of the current rectifier to increase the operating frequency of the peak detector circuit. An isolator (106) employs a current mirror (509) with a cascode transistor (512) having a bias potential which is dynamically adjusted to achieve accurate mirroring. An amplifier of a common mode feedback circuit (110) has improved linearity.

    摘要翻译: 峰值检测器电路(100)包括输出跨导放大器(102),电流整流器(104)和平均电路(108)。 电流整流器包括放大器(115),其减小电流整流器的输入阻抗以增加峰值检测器电路的工作频率。 隔离器(106)使用具有偏置电位的共源共栅晶体管(512)的电流镜(509),该偏置电位被动态调整以实现准确的镜像。 共模反馈电路(110)的放大器具有改善的线性度。