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. 05, 1994
Filed:
Feb. 02, 1993
Shiro Hosotani, Itami, JP;
Takahiro Miki, Itami, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
Low-order reference potentials including high-order reference potentials (VRT, VRB, VC0 to VC6) generated from a ladder resistor and potentials (V(i, j) (i=0 to 7, j=0 to 6)) are applied to potential lines, respectively, to be transmitted by various switches to analog bus lines (FR0a to FR14a) or analog bus lines (FR0b FR14b). The low-order reference potentials are applied to the analog bus lines (FR0b to FR14b) when it is judged that a sample signal potential falls in voltage zones (Z0 to Z3) as a result of comparison with the high-order reference potentials and are applied to the analog bus lines (FR0a to FR14a) when it is judged that the sample signal potential falls in voltage zones (Z4 to Z7). This provides for reduction in the number of switches connected to each analog bus line and in parasitic capacitance, so that a settling time of the low-order reference potentials is shortened. High-speed operation of a series-parallel A-D converter is achieved.