Patent ID: 9580819
Date: 2017-02-28
CPC Classifications: C23F

Claim:
1. A device for transmitting signals into a conductive liquid, the device comprising: a signal source having a housing configured for immersion in the electrically conductive liquid, the housing protecting the signal source from contact with the electrically conductive liquid; an electrically conductive surface portion of the housing exposed to the electrically conductive liquid; a load electrode configured to supply an electric load current into the electrically conductive liquid; an antenna electrode configured for immersion in the electrically conductive liquid a distance from the electrically conductive surface to act as a protection electrode; and a load current source and a protection current source within the housing; wherein the load current source provides a load current to the load electrode; wherein the protection current source includes a resistor electrically coupled between the electrically conductive surface portion and the antenna electrode and is configured to provide a protection current flowing between the electrically conductive surface portion and the antenna electrode and to increase the protection current in response to an increase in the load current.