Abstract: A recording apparatus is provided for recording data and block units together with management information for the block units of data as a track in the recording area of a non-erasable recording medium. The apparatus detects the recording status of the non-erasable recording medium. Based upon the detected recording status, the apparatus reserves a particular part of the track for recording management information. The apparatus records the management information in the reserved recording area.

Abstract: A semiconductor integrated circuit including a constant current circuit or an active load circuit, which includes two field effect transistors having the same type of channels connected in series with each other, wherein the threshold voltages of the field effect transistors are different in value from each other, and the K-values of the field effect transistors are different from each other and the threshold voltages and the K-values of the field effect transistors satisfy a predetermined condition, or wherein the gate widths of the field effect transistors are different from each other and the gate lengths of the field effect transistors are different from each other.