Abstract: An apparatus for automatically detecting overflow and imminent overflow conditions as data is transferred from an accumulator to a postscaler. As the data is output from the accumulator, the appropriateness of the predetermined scale factor to be used by the postscaler is determined. If an overflow condition will occur at the output of the postscaler, an overflow signal is generated, and the output of the postscaler is forced to .+-.1. If the output of the postscaler will produce data with an absolute value of greater than 1/2, an imminent overflow signal is generated.

Abstract: A plurality of print hammers are mounted on a horizontally movable carriage and adapted to scan a plurality of column positions of an impact printer. Each print hammer is provided with an energizible electrical coil which moves horizontally with the print hammers in the scan direction. The energizible electric coils on the print hammers cooperate with a fixed magnetic field provided by a pair of fixed bar magnets which extend beyond the distance scanned by the energizible coils on the print hammers.

Abstract: Detected weak signals representative of digital data signals are amplified which produces distorted digital data signals comprising an alternating current (A.C.) voltage signal component and a direct current (D.C.) voltage signal component. A processing circuit filters out the D.C. voltage signal component and converts the A.C. signal component into two substantially D.C. voltage signals representative of the peaks of the A.C. voltage signal component. These substantially D.C. voltage signals are applied across a voltage divider to provide voltage signals representative of the peak voltages of the original detected weak signals and to provide intermediate voltages which are uneffected by changes in magnitude and distortion of the A.C. voltage signal component of the digital data signals.

Abstract: Consecutive bit bubble memory devices employ a dummy detector element separated from the detector element. This arrangement causes substantial background magnetoresistor noise. The dummy detector of the present invention is located in a novel dummy array which minimizes the magnetoresistor noise, enhances the signal-to-noise ratio and enables the detection of bubble domains without error.