Pulse or digital communications – Synchronizers – Synchronizing the sampling time of digital data
Patent
1995-03-10
1997-03-25
Tse, Young T.
Pulse or digital communications
Synchronizers
Synchronizing the sampling time of digital data
375354, 375364, H04L 700
Patent
active
056152353
ABSTRACT:
The present invention provides, a two-system A/D converter, which provides a digital output signal with a higher conversion precision than is achieved by a single-system A/D converter. Conversely, by using a two-system D/A converter with a lower conversion precision, the present invention provides an analog output signal with a higher conversion precision than is achieved by a single-system D/A converter. Further, a digital signal clock changing unit produces data by performing high sampling of the first digital data trains, and the second digital data is synchronized with a second clock through an interpolation processing based on the timing difference between the first and second clocks. A high-precision A/D and D/A converter apparatus is thus realized by using two pulse code modulation coder/decoders (PCM.CODECs) and one digital signal processor (DSP) in a small, inexpensive structure.
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Kakuishi Mitsuo
Ueshima Tsuyoshi
Fujitsu Limited
Tse Young T.
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