The invention relates to a circuit comprising an antenna input, a signal input and a signal output, and a switching unit, wherein the antenna input is connected to a first protection device against electrostatic discharges, said first protection device being a band-pass filter in a \u03c0-configuration. An optical sensor signals a microprocessor that a coin is entering the rotating playing field, and a second optical detector detects the nearest target and communicates a target value to the microprocessor. The module includes a programmable limit switch connected to a press speed resolver and a dedicated on-board processor configured to receive the speed data. The frequency-hopping signals are arranged to include useful bands and one or more guard bands inserted between the useful bands, and a ratio of the useful bands to the guard bands being chosen according to a predetermined value of probability of interference interception. The upper portion is structured to prevent halo dopants from penetrating an inversion layer of the structure.