Electrical transmission or interconnection systems – Personnel safety or limit control features – Interlock
Patent
1981-09-09
1986-03-04
Heyman, John S.
Electrical transmission or interconnection systems
Personnel safety or limit control features
Interlock
307360, 307547, 307268, 307608, 328147, 328164, H03K 508, H03K 5135
Patent
active
045742065
ABSTRACT:
A wave-shaping circuit which comprises a comparator for comparing the level of a signal reproduced from a magnetic tape on which, for example, PCM signals are recorded with the level of a reference signal, and a D flip-flop circuit for holding an output signal from the comparator for a prescribed period. Where the reproduced signal has a higher level than the original level of the reference signal, then the reference signal is made to have a higher level than the original level by an output signal from the D flip-flop circuit, that is, an output signal from the comparator. Where the reproduced signal has a lower level than the original level of a reference signal, then the reference signal is made to have a lower level than the original level by the output signal from the comparator. As a result, strains occurring at the high density recording are not reproduced.
REFERENCES:
patent: 3225213 (1965-12-01), Hinrichs et al.
patent: 3491304 (1970-01-01), Justus et al.
patent: 3543170 (1970-11-01), Diederich
patent: 3701954 (1972-10-01), Seminatore et al.
patent: 3996479 (1976-12-01), Schmitz
patent: 4406988 (1983-04-01), Scholz
"Upper and Lower Thresholds Can Be Set Independently In Latching-Comparator Circuit", R. S. Viles; ELECTRONIC DESIGN, vol. 26, Dec. 20, 1977 p. 176.
Kojima Tadashi
Todokoro Shigeru
Heyman John S.
Tokyo Shibaura Denki Kabushiki Kaisha
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