An integrated circuit having devices fabricated in both SOI regions and bulk regions, wherein the regions are connected by a trench filled with epitaxially deposited material. The outer wall of the ladder cam bracket is formed with a protrusion which protrudes toward a branch section of the intake manifold in such a manner as to prevent the branch section of the intake manifold from causing an interference with the fuel delivery tube. The board connecting part, the latch lock part, and the lock cancellation operating part are integrally provided with the lock arm member so that a retaining action and a cancelling action of the inserted signal transmission medium is carried out by operation of a single member. Furthermore, the laser oscillator is capable of outputting radiation at a first frequency. Alternatively, a transceiver may generate thermal noise in an idle slot state and a corresponding noise level may then be supplied to the power amplifier.