[sdiy] AD633: Z inputs and W Loops

[Tim Ressel]

The resistor network adds gain. Look at figure 16 of the data sheet. It has R1 between W and Z, and R2 from Z to a point called "s", which we will ground for this. The gain is shown as (R1+R2)/R1. 




Tim Ressel
Circuit Abbey
503-750-9331
timr at circuitabbey.com




>________________________________
> From: "alfred.pear at gmail.com" <alfred.pear at gmail.com>
>To: synthdiy diy <synth-diy at dropmix.xs4all.nl> 
>Sent: Tuesday, February 19, 2013 7:43 AM
>Subject: [sdiy] AD633: Z inputs and W Loops
> 
>Hi all -
>
>Apologies for chronic beginner questions -
>but I'm working a bit on revising my AD633 ring modulator schematic
>and I don't fully understand the relationship re: the resistor from
>the W output to the Z output and from the Z output to ground.
>I understand that there is some sort of gain addition (+ Z, according
>to the datasheet) - but I don't totally understand how to do the math
>to determine this gain, nor do I understand how the resistor from W
>factors in to this equation.
>
>Hope you are all having productive mornings!
>-AP
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