Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1989-01-19
1990-03-06
Zazworsky, John
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307542, 328165, 369 13, H03K 1716, H03K 1726
Patent
active
049068741
ABSTRACT:
An analog signal switching device for use in an optical memory device having a recording/erasing mode and a mode other than the recording/erasing mode is disclosed. The switching device includes a source for producing a switch control signal which is HIGH during the recording/erasing mode and LOW during the mode other than the recording/erasing mode. An analog switch is provided for receiving a direct input analog signal and a held input signal and for providing as output the direct input signal during the LOW state of the switch control signal, and the held input signal during the HIGH state of the switch control signal by a switching operation. Further provided is a mask signal generator for generating a mask signal which covers a period during the HIGH state of the switch control signal so as to cover a period during the switching operation of the analog switch, and a gate circuit controlled by the mask signal for allowing the direct input analog signal to pass therethrough during the absence of the mask signal and for preventing the held input signal to pass therethrough during the presence of the mask signal. Thus, noise signals produced by the switching operation of the analog switch are eliminated.
REFERENCES:
patent: 3947697 (1976-03-01), Archer et al.
patent: 4311963 (1982-01-01), Watanabe et al.
patent: 4701715 (1987-10-01), Amazawa et al.
patent: 4785252 (1988-11-01), Fuji et al.
patent: 4843604 (1989-06-01), Fujiwara et al.
European Search Report No. EP 89300569.4.
Deguchi Toshihisa
Fuji Hiroshi
Kojima Kunio
Maeda Shigemi
Terashima Shigeo
Sharp Kabushiki Kaisha
Zazworsky John
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