Abstract: The present invention is to provide a safety tripod comprising two support assemblies and a pivot assembly, wherein each support assembly comprises two support members having ends pivotally connected with each other by a first pivoting member, and two connecting members having ends pivotally connected with other ends of the two support members by second pivoting members respectively and other ends pivotally connected with each other by a third pivoting member; and the pivot assembly is disposed between ends of the two support assemblies adjacent to the first pivoting member, for enabling other ends of two support assemblies distal to the first pivoting member to be expanded away from or moved close to each other. Thus, the support members and the connecting members can be folded and overlapped with each other or unfolded to form a triangle structure.

Abstract: A programmable logic device, in accordance with an embodiment of the present invention, includes a plurality of multiplexers, having fuse input terminals and input signal terminals, and a plurality of associated fuses providing fuse signals to the fuse input terminals to control selection of the input signal terminals. The fuses in a first state select a first input signal terminal of the input signal terminals, with a first multiplexer from the plurality of multiplexers receiving a first logic level signal at the first input signal terminal and providing the first logic level signal to the first input signal terminal of a first set of the plurality of multiplexers. The fuses associated with the first set are adapted to be programmed before the fuses associated with the first multiplexer.