According to one embodiment, an electronic equipment includes a keyboard unit having a metal plate, and a plurality of keys arranged on the metal plate, and an antenna member which is provided at a position above the metal plate of the keyboard unit and inside the arranged keys. The clock frequency of a clock signal used by the electronic circuit is controlled such that instantaneously large changes to the clock frequency are avoided by use of a frequency filter that is capable of generating frequency ramps having a linear slope which is used as a feedback signal in a digital phase-locked loop clock circuit in lieu of a discrete, stair-stepped feedback control signal. Thus, high-accuracy alignment can be carried out without sacrificing throughput, and the performance of a semiconductor device is improved. Any host system generates an error when data from a retrieved block from the plurality of blocks computes to a checksum that is different from the value contained within the checksum field for the retrieved block, and the retrieved block does not contain the initialization pattern. Release from the sand screen will be by pumping a ball down the string and engaging this in a catcher to slim the sliding sleeve open, giving hydraulic access to the liner hanger and engaging slips in the previous casing.