From: blockedofcourse@foo.invalid   
      
   On 2/9/2026 4:52 PM, Christopher Howard wrote:   
   > Hi, I was wondering what is the cheapest (and hopefully, simple to wire   
   > up) way to get an analog square function. I.e., input a voltage x, and   
   > get voltage x^2 out. Or x^2/10. Or some reasonable approximation of   
   > either of those.   
   >   
   > The standard trick is to feed the voltage into both inputs of a   
   > multiplier chip. But even those AD633 chips are tough to afford on my   
   > budget (around 20 USD each).   
      
      
      
   If your need is not an "academic exercise", you might consider   
   WHY you need such a transfer function -- its role in your design.   
   (i.e., thinking about the design differently may eliminate that   
   "need").   
      
   In addition to voltage range/domain, you should also consider bandwidth   
   desired.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)