H - Electricity – 03 – K
Patent
H - Electricity
03
K
328/87
H03K 5/135 (2006.01) H03M 1/00 (2006.01)
Patent
CA 1340968
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, 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 an d 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).
617096
Kakuishi Mitsuo
Ueshima Tsuyoshi
Fetherstonhaugh & Co.
Fujitsu Limited
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