AD633 multiplier... help!

[jonny]

So using this from the datasheet:


Okay so here's my input waveform:


Here's my output up one octave:


Which frequency wise is fine, but amplitude wise every second part of the waveform is about 2/3 the amplitude of the other? Anyone know why this happens? f~400hz my input wave is about 8Vpp, and i'm running the AD633 on a bipolar +-9V supply which should be all fine and dandy.  

[amptramp]

It may work better with X2 and Y2 connected to -E with the amplitude adjusted for the same peak-to-peak swing.  These inputs are differential, but there may not be the same gain on both sides.

[jonny]

In that case anyone know of a simple inverter I could use? Hmm..

[~arph]

Necro bump...  I think you need to feed part of the w output back to the Z input. as you can see in the datasheet.  Something like 1k from the W to the Z and 3k from Z to GND.