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:
Feb. 25, 1997
Filed:
May. 12, 1995
Kazuyuki Suga, Tokyo, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A signal-processing circuit has the first reference-voltage setting circuit for setting a lower-limit reference voltage and an upper-limit reference voltage for the first A/D converter, a data-storing section for storing digital data obtained by the first A/D converter, and the second reference-voltage setting circuit for setting a lower-limit reference voltage for the second A/D converter to a voltage that is lower than the voltage corresponding to the digital data stored in the data-storing section and that is higher than the lower-limit reference voltage set by the first reference-voltage setting circuit, as well as for setting an upper-limit reference voltage for the second A/D converter to a voltage that is higher than the voltage corresponding to the digital data stored in the data-storing section and that is lower than the upper-limit reference voltage set by the first reference-voltage setting circuit. Thus, the signal-processing circuit releases digital data based on the data obtained by the second A/D converter. This arrangement makes it possible to convert the analog data released from the line sensor into digital data at high speeds with high resolution and release the resulting data.