Electronic circuitry is described having a first transistor having a first gate dielectric located between an electrically floating gate and a semiconductor substrate. The magnetic flux is thereby concentrated in such a way by a first flux guide piece that the magnetic flux acts vertically upon an effective surface of a component of the conveyor chain andor the conveyor belt. A first input terminal of the transfer switch is coupled to the output terminal of the LED lightbar, and a second input terminal of the transfer switch is coupled to a feedback voltage. A spring-loaded plunger unit serves to prevent the turret from freely rotating on the base ,until the coupling elements are fully engaged with each other, during the moving operation of the coupling elements between the engaged and disengaged positions. A correspondence between the downlink radio resource and the uplink radio resource for the known signal is defined for null steering based on the known signal in the unit period.