Mixer

Hi all,

just a straight forward question. I have to build an analog mixer circuit to demodulate a frequency multiplexed signal.

currently, my preference is not to build a complicated one because the implementation has to be within 4 hours. so ideally it should be as simple as possible to ease me in troubleshooting the circuit within 4 hours.

I have found one circuit that looks like this:
**broken link removed**

my problem is: i have totally no experience in building an analog mixer. Can someone tell me will this circuit work as a mixer?

also, if there are any other simpler circuits, please let me know.

Thanks in advance.

There are endless different types of mixers, but you give no idea of what you might need.