Reel drive motor control system for cassette/cartridge tape recorders

Claim 1

A tape transport control system for tape apparatus including a supply reel with a predetermined amount of tape wound thereon; a take-up reel arranged to wind up said tape as passed thereto from said supply reel, a transducer provided on a tape path between said supply and take-up reels, and means for transporting said tape, said control system comprising: (a) means coupled with said supply reel and said take-up reel for producing first and second detection signals respectively corresponding to the speed of rotation of said reels, said detection signals being in the form of pulses varying in frequency with the speed of rotation of said reels; (b) frequency divider means, said frequency divider means having an input and an output, said pulses from said second detection signal being input to said frequency divider means, said frequency divider means dividing said pulses by a predetermined amount η A to produce divided pulses; (c) counter means responsive to said divided pulses and a predetermined amount η B for counting said pulses from said first detection signal and for producing first control pulses each time the number of said pulses from said first detection signal during one repetition period of said divided pulses exceeds said amount η B ; and (d) control means responsive to said first control pulses for controlling said transporting means.