Reading system for a code disk analog-to-digital converter and a

Details Reading system for a code disk analog-to-digital converter and a Reading system for a code disk analog-to-digital converter and a

1976-09-03

1978-06-20

Sloyan, Thomas J.

Communications: electrical

Audible indication

Percussion-type sound producer

G08C 904, H03K 1302

Patent

active

040964760

ABSTRACT:
A reading system for a hybrid A-D converter having, in combination, code disk A-D converters for converting an analog quantity such as a rotation angle or the like into a digital quantity and a neighborhood absolute value detector such as an inductosyn, a resolver or the like for providing the absolute value of a rotation within a small range thereof to, thereby extend the neighborhood absolute value region. Each of the code disk A-D converters supplies an output signal l and a carry signal Cr(1) which is generated depending on whether an output signal from a lower order code disk A-D converter is included in a predetermined upper group to a corresponding one of the logical circuits which are provided so as to correspond in number to the code-disk A-D converters. The logical circuit performing the logical operation L = l .multidot. (Cr.multidot.l-1+Cr.multidot.l+1) provides a signal representative of one digit whereby the outputs from the A-D converters are prevented from errors upon carrying. The neighborhood absolute value detector supplies a carry signal Cr(2) depending on whether the neighborhood absolute value is included in the predetermined upper group. The carry signal Cr(2) and the inverted signal Cr(2) of the carry signal Cr(2) are adapted to be supplied to the logical circuit in time-sharing relation to the carry signal Cr(1) and the inverted signal Cr(1) of the carry signal Cr(1).

REFERENCES:
patent: 3473098 (1969-10-01), Waller
patent: 3478346 (1969-11-01), Narukiyo
patent: 3603978 (1971-09-01), Narukiyo

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