Abstract: A pen control circuit includes a current control circuit for controlling the magnitude of a driving force of a drive coil, a feedback circuit for supplying a feedback signal to the current control ciruit, a clipper for extracting the pen position detection signal only when the level of the pen is higher than a predetermined level with respect to a recording surface, and a selector for selecting first, an output from the clipper as a drive current setting value of the current control circuit during an initial pen-down period and second, the pen pressure setting signal as the drive current setting value after the output from the clipper is disabled. The pen control circuit also includes a current setting circuit for supplying a predetermined drive current setting value to the current control circuit in a pen-up mode and a limiter for limiting a current supplied to the drive coil in accordance with a pen position detection signal when the pen is moved upward to a predetermined position.

Abstract: Device for moving a member linearly is composed of at least two permanent magnets, a driving coil, circuit for supplying the driving coil with current, a moving member, and a detector. The two permanent magnets form magnetic field of first direction in first space and field of second direction being reverse to the first direction in second space. Since the driving coil includes a portion disposed in the first space and a portion disposed in the second space, a movement of a given direction is created based on the current flowing through the driving coil. The first and second spaces include a region where the strength of the magnetic field varies gradually. Therefore the relative movement of the driving coil and the permanent magnets can be detected using the detector. The moving member is connected to either the driving coil or the permanent magnet a pen or the like can thus be moved linearly if attached to the member.