You may also be looking for the article on molecular phase inverters.

A phase inverter was a piece of technology which was used for various purposes.

The Idanians use phase inverters in their dataports, making the information on the device much more difficult to be decoded. (DS9: "A Simple Investigation")

On the USS Enterprise-D, three phase inverters were used in its transporter system's resonator array. (TNG: "Relics")

When Geordi La Forge presented Wesley Crusher his upgraded plasma-dyne relay in main engineering in 2370, Crusher suggested suspiciously that it would be better to put a second phase inverter in there. (TNG: "Journey's End")

Additional references Edit

• ENT: "Marauders"
• VOY: "Drive"