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你有没有尝试过设计制造一种可编程电流源驱动接地负载?如果你尝试过的话,那么,你定会了解到在制作一个具有高共模抑制比和良好带宽的差动放大器时所涉及到的失败心情和元器件的敏感性。将这些特性作为一个差动输入增加上去,就会使电路变得相当复杂而难以控制。 Analog Devices公司的AD830叫做“视频差动放大器”,它有助于简化某些设计问题。但是,该器件的数据表不包括本文所示的特别有用的电路(参见图1)。该电路由两个差分输入端组成。与普通的运算放大器不一样,当两个输入的差值之和为零时,AD830的输出为
Have you ever tried to design and manufacture a programmable current source to drive a grounded load? If you have tried, then you will know about the fabrication of a differential amplifier with a high common-mode rejection ratio and a good bandwidth The failure of the components and the sensitivity of the components. Adding these features as a differential input can make the circuit quite complicated and unmanageable. Analog Devices’ AD830 is called a “video differential amplifier,” and it helps to simplify certain design issues. However, the datasheet for this device does not include the particularly useful circuitry shown here (see Figure 1). The circuit consists of two differential inputs. Unlike normal op amps, when the sum of the two input differences is zero, the output of the AD830 is