A magnetic circuit includes a stationary iron core, a permanent magnet, and an armature, in a circular pattern. The device presents dimensions that are relatively small, because of the way the panels fold, and does so without leaving fold marks on the sheets. An updateable database is populated with application circuit information and a software routine is responsive to the measured electrical characteristic and configured to adjust the electrical characteristics measured by the codec based on the application circuit information in the database. A block of RAM is partitioned into a plurality of blocks of RAM to allow reading simultaneously data symbols from the plurality of blocks of RAM to produce an in-phase and a quad-phase data symbols simultaneously. Such switches may be useful in producing Y-adapter-type lead multiplexers for implantable devices, for example, as well as in producing switchable electrode arrays, sensor leads and the like. The sheet regulating member may be set in an upper guide included in an upper part of the rear guide or may be set at a rear end in a sheet conveying direction of the punch unit.