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Digital-analog-converter

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Digital-analog converter

Details

Inventors: Kaneko, Haruo; Katagiri, Yoshio; Yano, Kaoru;
Assignee: Nippon Electric Company, Ltd. (Tokyo, JA)
Primary Examiner: Sloyan; Thomas J.
Assistant Examiner:
Attorney, Agent or Firm: Sughrue, Rothwell, Mion, Zinn & Macpeak

A digital-analog converter is provided wherein a digital signal from an analog-digital converter is compared with a predetermined value and is suppressed to zero if it is smaller than the predetermined value, the resulting digital signal being converted into a corresponding analog signal. The converter is useful particularly in communication networks, serving to improve communication quality in terms of noise by suppressing input signals of amplitudes below a certain level. This invention avoids the need for an analog delay circuit as required by a conventional analog-type device.

DETAILED DESCRIPTION In accordance with the present invention, there is provided a novel digital-analog converter wherein a digital signal from an analog-digital converter is compared with a predetermined value and is suppressed to zero if it is smaller than the predetermined value, the resulting digital signal being converted into a corresponding analog signal.
The converter is useful particularly in communication networks, serving to improve communication quality in terms of noise by suppressing input signals of amplitudes below a certain level.
Further, this invention avoids the need for an analog delay circuit as required by a conventional analog-type device.

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