Coded data generation or conversion – Analog to digital conversion followed by digital to analog...
Patent
1985-08-30
1988-09-20
Sloyan, T. J.
Coded data generation or conversion
Analog to digital conversion followed by digital to analog...
377108, 381 31, 36472401, H03M 100
Patent
active
047728736
ABSTRACT:
The invention is a digital record/playback apparatus including an input digital filter, and A/D converter, a solid state memory, a D/A converter and an output digital filter. The entire system is driven off a single clock source which allows the frequent response of the filters to be modified simultaneous with the sampling frequency of the A/D and D/A converter. This allows the record/playback apparatus to record low frequency signals, such as medical data, as well as relatively high frequency signals such as voice, by simply changing the frequency of the clock source. In addition, the apparatus includes an expandable memory which allows recording of up to one hour or more of program material.
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RCA Manufacture's Data Sheet entitled "CMOS Presettable Divide-By-`N` Counter, pp. 113-117.
National Semiconductors MF4 and MF6 Data Sheet Jul. 1983.
Digital Recorders, Inc.
Jenkins Richard E.
Sloyan T. J.
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