Hello!

Is there such a circuit element where, such table is possible?
DC input ... ports connected
0 volt ..... A and Z (or Z to Z, essentially off)
2 volt ..... B and Z
3 volt ..... C and Z
4 volt ..... D and Z

It seemed like solid state relays were what I was looking for, but most all of them act as simple switches (on or off).

Thanks!

 

You can use voltage comparators to signal the different input levels, but the meaning of "ports" is not at all clear. Perhaps you can clarify that?

 

Thanks for the quick reply!
I guess in a practical sense, Z will be output port (just a metal lead), and A,B,C,D will be its input leads.

Even simply: four (or more) separate switches with each of its one end connected to a common node, Z. One switch will be on at a time, controlled by voltage.

Perhaps, a voltage controlled analog multiplexer, if such thing exists?

I'll be testing the characteristics of four different antennas and would like to do this using a remote (voltage) switch

Thanks!

 

For RF response, a CMOS analog switch might not be the thing. Four small reed relays would be more like it.

On reflection, the switching would be easiest by means of a rotary switch. Each position selecting a different reed switch. That way, the voltage levels are not necessary.