可以看一下如下文章，AN-212， 这是经过验证的设计。

• ### Use AD834 for a wideband analog multiplier

Dear all

My circuit design is followed analog devices suggestion(see as attachment 1 Fig.13)

And It said its bandwidth is about 480MHz.

What I need is a analog multiplier which transfer function W-output=Input1(t)*Input2(t).

And the bandwidth over…

我按着手册上的图（图一）做了一个电路图，原理图是如图二，巴伦用的是TC1-1-13的型号，出现了个问题。

1、X，Y的输入都是1V的正弦波信号，输入频率也是一样的，相当于倍频把，但是当我输入频率增加的时候，-3dB带宽连100MHz都达不到，是我电路的问题吗？

2、手册上写的带宽能到500MHz才对，还是说500MHz的不是用图一的电路图，应该用图三？这两个图有什么区别吗？区别是什么？变压器带抽头和不带抽头有差吗？CT端接电源又是为什么呢？如果用图三的电路应该选择什么型号的变压器可以呢？

1、如上图所示，焊接上芯片座子，仅焊接上电阻R31和R43，让电路在无输入、无负载的情况下工作起来，观察其功耗和发热的情况。

2、参考芯片手册提供的电路…

• ### How to use a Balun at the Output of the Op Amp AD834

Hi,

I'm working on an project in an university lab, in which I'm trying to use op amp AD834 to multiply a alternated square wave (-0.25 V and 0.25 volts are its peak values) by a sinusoidal current (-2.5 Amperes and 2.5 Amperes are its peak values…

• ### RE: -1/Vin function with multiplier or divider chip

Hi Monse,

I was looking on some of our multipliers/dividers product and found a few devices that can cater your supply rails requirements. AD834, AD835,  AD538 and AD539 however, there are no exact configuration on how to achieve your transfer function…

• ### RE: Use AD835 for analog multiplier

Dear js

But I have two question further.

1.Do you mean this IC(AD835) have the ability to accomplished this transform?

2.Do this circuit(basic operation without any other electric elements)can accomplished my…

• ### Problems in True-RMS circuit

I have four circuit for rms measurment, but all of them are not working correct. I use multisim 14 for modeling, i am sure, that have a one proble, for this curciuts. In my mind a correct schematic for RMS should have a voltage more them some piko wa…

• ### RE: Using AD835 as a Squaring Circuit

Hello Janmay,

Just to be sure, it seems you have changed devices from the AD834 to an AD835. These devices are quite different, did you make the change, or might this be a typo?

Let's assume youre using the AD835. If you've installed the filter as described…