• AD8067 Spice Model Problem

    I am trying to run the AD8067 Spice model in a third party simulator. I have tried inverting and non-inverting configurations with a gain of 10. What I see is large currents between +Vs and the non-inverting input and gain far less than 1. I have no problem…

  • AD8065 SPICE model's noise performance is incorrect

    I use the SPICE model downloaded from the ADI website of AD8065 and configured as a G=+1 buffer and simulate for the ouput nosie density. It is supposed to be the same with the  equivalent input noise density. But the part of 1/f noise is missing and the…

  • RE: cancel JFET amplifier input capacitance changes

    Harry, Jino,

     

    We built a full power supply bootstrapped amplifier with the following architecture:

       

    It uses the LTC6268 wideband low input capacitance amplifier for the front end powered by symetrical bootstrapped level-shifted supply rails, buffered…

  • RE: 精品连载——模拟噪声分析常见误区,你点赞我来更!

    【第更】误区八:电压噪声最低的放大器是最佳选择

    选择运算放大器时,电压噪声常常是设计人员唯一考虑的噪声规格。其实电流噪声同样不能忽略。除非在有输入偏置电流补偿等特殊情况下,电流噪声通常是输入偏置电流的散粒噪声:

    电流噪声通过源电阻转换为电压,因此,如果放大器输入端前面有一个大电阻,那么电流噪声对系统噪声的贡献可能大于电压噪声。电流噪声会成为问题的典型情况是使用低噪声运算放大器且其输入端串联一个大电阻时。

     

    一言不合就举栗子:考虑低噪声运算放大器ADA4898-1,其输入端串联一个10…

  • Interface for Implementing NLMS algorithm in ADAU1452

    Hi,

    I am using ADAU1452 SigmaDSP to implement an algorithm derived from NLMS adaptive algorithm. It is a dual-path algorithm,where it stores the background (shadow) coefficients. It would be helpful if I can get a new interface for the existing NLMS with…

  • RE: I2C Timing Characteristics for AD9889B

    Hi Dave,

         You can find that information on page 12 of the AD9889B Hardware User's Guide in the FAQ section. Here is the clip.

    93849e97dd2dd834835b8853894dd592.html

    Best,

    Chris

  • TAGS LIST: Amplifiers

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  • RE: Operation Amplifier for video-ADA4891-1

    Sorry for the delay on this. I have been traveling on business.

    OK, you tried a different op amp and it worked. Did you try a different sample of the ADA4891-1?

    In looking at the data sheet for the amp, specifically page 18, note that for single supplies…

  • RE: AD9880 IBIS model with drive strengths

    Hi James,

         I have been looking at this with our designers, and I don't see any real issue with our model - except for the fact that the 'TYP' curve for some reason gets 'stuck' at 0. I will work to repair that, but if you ignore that portion of the model…