发明名称 |
GECOMBINEERDE SNELHEIDSREGELING EN SECTORINDEXERING VOOR SCHIJFREGISTRATIETOESTELLEN EN DERGELIJKE. |
摘要 |
The specification discloses a method and apparatus for providing speed control and rotational indexing of a disc recorder, based upon a particular use of a plurality of electrical pulses produced, for example, as the slots of a slotted wheel, axially coupled to a recording disc, pass a transducer. The primary repetition rate of pulses in response to equally-spaced slots is used for speed control of the recording disc. A secondary pulse rate occurring between two successive pulses resulting from adjacent slots with different spacing is used to establish an index pulse correlated with a reference point on the disc. |
申请公布号 |
NL7803523(A) |
申请公布日期 |
1978.10.24 |
申请号 |
NL19780003523 |
申请日期 |
1978.04.03 |
申请人 |
SYCOR, INC. TE ANN ARBOR, MICHIGAN, VER. ST. V. AM. |
发明人 |
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分类号 |
G11B17/00;G11B27/10;H02P23/00 |
主分类号 |
G11B17/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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