The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 20, 1982
Filed:
Jun. 11, 1980
Giorgio Orlandi, Milan, IT;
Abstract
To test the performance of an analog/digital converter, used for translating bipolar message signals into 8-bit words, the analog input of the converter is connected across a voltmeter while its digital output works into a buffer register distributing the seven amplitude bits of an emitted code word to one set of stage inputs of a comparator having another set of stage inputs connected to a manually operable word simulator; the sign bit of the code word is entered in a separate store. A logic network with inputs connected to the sign-bit store, the comparator and the word simulator controls two reversible counters which, upon manual operation of the word simulator, emit selected numerical values translated by associated digital/analog converters into output signals fed to the analog/digital converter to be tested. The values emitted by one counter represent entire quantization steps while those emitted by the other counter are aliquot fractions of such a step; the latter counter is started in response to sign-bit changes during an offset check and in response to comparator-output changes during a calibration check.