Electronic digital tape timer

Details Electronic digital tape timer Electronic digital tape timer

G - Physics

04

C

58/0.5

G04C 3/00 (2006.01) G11B 27/13 (2006.01) G11B 27/34 (2006.01) H03K 21/18 (2006.01)

Patent

CA 1103044

ABSTRACT OF THE DISCLOSURE A digital tape timer containing a counter and associated arithmetic control and timing logic to detect the relative tape position and provide a time-multiplexed, binary coded decimal (BCD) output for the display of the tape position in hours, minutes, seconds and/or tenths of seconds of play/record time at any of the selected tape speeds. The timer employs an eight digit format; five digits are dis- played and one of the three remaining digits becomes the least significant digit whose modulus is altered to present the correct division rate to the incoming tach pulses. The counter generates serial digits with one digit appearing on a selected clock line, whereby all eight digits are transmitted using four wires for the binary code plus one wire for selection of each digit to be displayed Thus, the septum inherently provides the added advantage of time-multiplexing of the timer system output. The pre-division of the tach pulses using the LSD provides division which instantly and accurately follows the counting direction. -2-

301935

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