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:
Oct. 31, 2006
Filed:
Nov. 02, 2004
Yukio Koyanagi, Saitama, JP;
Yukio Koyanagi, Saitama, JP;
Neuro Solution Corp., Tokyo, JP;
Abstract
A digital-analog converter includes a counter () for performing counting operation according to clocks (CK, CK), a comparator () for comparing the count value to a digital input value and outputting the clocks (CK, CK) until the values coincide, switches (SW, SW) which turn ON/OFF according to the clocks (CK, CK), and a capacitor (C) which charges and discharges by utilizing constant current sources () when the switches (SW, SW) are ON. A digital portion () including the comparator () and the counter () is completely separated from an analog portion () including the capacitor (C) and the switches (SW, SW) and these portions are connected only by the clocks (CK, CK), so that the digital portion () and the analog portion () can be designed separately.