Apparatus for braking a spindle motor in a disc playback system

Claim 1

In a CLV disc playback system of the type including a motor for rotating disc records responsive to motor drive signals and including signal pickup means for reproducing recorded information from disc records, said recorded information containing interspersed subcodes having values related to the radial position currently accessed by said pickup means with respect to the axis of the disc, apparatus for stopping the rotation of rotating discs, comprising: detector means, coupled to said pickup means, for detecting said interspersed subcodes related to the radial position of said pickup means; means responsive to detected subcodes for generating pulses indicative of detection of said subcodes; a counter arranged to be preset with a value representing a predetermined subcode and responsive to said pulses for providing a count value equal to a sum of said value representing a predetermined subcode and the number of said pulses occurring after presetting said counter; means, responsive to user stimuli for stopping rotation of said disc, for storing a current count value provided by said counter; and means responsive to said current count value for providing a predetermined reverse drive braking signal to stop rotation of said disc record; and means for applying said braking signal to said motor.