Analog data acquisition device

Details Analog data acquisition device Analog data acquisition device

1982-02-16

1984-06-12

Miller, C. D.

Communications: electrical

Audible indication

Percussion-type sound producer

340347C, 340347DA, H03K 1302

Patent

active

044545002

ABSTRACT:
An analog data acquisition device fetches a plurality of analog data by a multiplexer in time-division, compares the analog data fetched with a reference value applied from a digital-to-analog converter by a two-input comparator, and produces the result of comparison to a data bus. The result of comparison is also applied to a successive approximation register where the analong-to-digital conversion is effected by successively changing the digital data to the digital-to-analog converter, and the digital data converted is read out onto the data bus.
The digital data applied to the digital-to-analog converter is either the output from the successive approximation register or the output from the reference register loaded through the data bus, in accordance with the contents of the control register loaded through the data bus. Thus, in which mode the device operates, in the comparing mode or in the analog-to-digital conversion mode, is selected by the control register.

REFERENCES:
patent: 4112427 (1978-09-01), Hofer
Schoeff, "IEEE Journal of Solid-State Circuits", vol. SC-13, No. 6, Dec. 1978, pp. 746-753.
Walton, "IBM Technical Disclosure Bulletin", vol. 7, No. 10, Mar. 1965, pp. 881-885.

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