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US 4,543,617 AGranted
Recording apparatus
AssigneeNippon Columbia Co., Ltd.
InventorYoshikazu Kobayashi
Life of this patent
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Abstract
A frequency modulated (FM) signal is recorded as pits or dots along a track formed as a concentric or spiral shape on a recording medium such as a recording disc. The pits or dots are arranged on a radial line during at least a predetermined interval.
Claims7
A recording apparatus for recording a recording signal, which includes synchronizing signals having equal intervals, therebetween, on a disc comprising:
- signal generating means for generating a plurality of signals with frequencies synchronized in phase with said synchronizing signals;
- selecting means for selecting signals with frequencies, corresponding to the respective levels of said recording signal, from said plurality of signals to provide a frequency-modulated signal;
- means for synchronizing the rotation of said disc, on which said recording signal is recorded, with said synchronizing signal to thereby rotate said disc at a constant angular velocity and at a constant speed being a whole multiple of the period of said synchronizing signal;
- and a means for recording the output from said selecting means on said rotating disc.
1 more element
Dependencies are inferred from the claim text.