Clock device

Square-extensional mode clock signal generation device comprising:

• a microelectromechanical resonant element overhanging a surface of a substrate and having, in top view, a square shape and, at each corner of the square shape, a beam arranged perpendicularly to a diagonal of the square shape running through the corner, the ends of each beam being respectively coupled to the substrate by anchorages perpendicular to an axis of the beam;
• and
• four nanoelectromechanical transduction elements arranged perpendicularly to the beams and continuing the diagonals of the square shape, each of the four nanoelectromechanical transduction elements being coupled to one of the beams and further coupled to the substrate by an anchorage.