A frequency synthesizer is disclosed. The controller is programmed to monitor a maintenance condition of the electronic faucet and to selectively open and close the valve to generate a fluid flow pattern through the passageway to provide an indication to a user of an existing maintenance condition. Axial and radial positioning of the transmitter coils is done by monitoring outputs at receiver coils to achieve a minimum. A second gate insulating film is formed on the second element region, and a second gate electrode is formed on the second gate insulating film. As a firmware-based standard, UGA facilitates updating a system to support both evolving and new hardware features.