In accordance with some embodiments, an integrated circuit device comprises a circuit configured to provide a sense signal representing a dynamic power requirement of the circuit to a first sense node, a first sense switch coupled between the first sense node and a first die bump, and a sense switch controller configured to provide a control signal to the first sense switch. Furthermore, the present invention relates to processes and intermediates for preparing compounds of formula, to insecticidal, acaricidal, nematicidal and molluscicidal compositions comprising them and to methods of using them to combat and control insect, acarine, nematode and mollusc pests. Preferably, the polyarylene sulfide to be in the composition has a specific index to the degree of branching and a specific flexural strength.