G - Physics – 11 – B
Patent
G - Physics
11
B
352/32.1
G11B 13/04 (2006.01) G11B 7/00 (2006.01) G11B 7/004 (2006.01) G11B 7/125 (2006.01) G11B 7/13 (2006.01) G11B 11/105 (2006.01) G11B 19/04 (2006.01)
Patent
CA 1328133
ABSTRACT OF THE DISCLOSURE 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 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.
588715
Deguchi Toshihisa
Fuji Hiroshi
Kojima Kunio
Maeda Shigemi
Terashima Shigeo
G. Ronald Bell & Associates
Sharp Kabushiki Kaisha
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