Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Synchronizing moving-head moving-record recorders
Patent
1990-09-21
1993-04-13
Sniezek, Andrew L.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Synchronizing moving-head moving-record recorders
360 69, 360 7304, G11B 2104, G11B 1546
Patent
active
052028011
ABSTRACT:
An integrated circuit includes a drum phase detection signal generating unit formed by two-stage amplifiers and a comparator, a drum frequency detection signal generating unit similarly formed by two-stage amplifiers and a comparator, a capstan frequency detection signal generating unit, and a supply reel frequency detection signal generating unit and a take-up reel frequency detection signal generating unit each formed by a comparator. From each associated voltage source a predetermined voltage is applied to each of the first stage amplifiers, second stage amplifiers, and to the comparators of the drum phase detection signal generating unit, drum frequency detection signal generating unit, capstan frequency detection signal generating unit, supply reel frequency detection signal generating unit, and the take-up reel frequency detection signal generating unit. In this manner, the drum phase detection signal generating unit, drum frequency detection signal generating unit, capstan frequency detection signal generating unit, supply reel frequency detection signal generating unit, and the take-up reel frequency detection signal generating unit may be formed on one and the same integrated circuit and can be operated in stable fashion.
REFERENCES:
patent: 3851189 (1974-11-01), Moyer
patent: 3889290 (1975-06-01), Seaton
patent: 4104684 (1978-08-01), Wakami et al.
patent: 4375037 (1983-02-01), Ikushima
patent: 4930031 (1990-05-01), Nagahara et al.
Microcomputer Hardware Handbook, 1982, p. 13.
Microelectronics by Jacob Millman 1979, sections 17.3-17.4.
"The Art of Electronics" by Paul Horowitz et al., 2nd Edition, 1989, pp. 457 and 458.
Sheladia Varsha V.
Sniezek Andrew L.
Sony Corporation
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