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:
Nov. 26, 2002
Filed:
Nov. 07, 2000
Hirokazu Okada, Kawasaki, JP;
Tachio Yuasa, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A resistor string digital-analog conversion circuit includes three resistor strings connected in series, a controller, and a switch group. The controller controls switchover of the switch group according to a signal of m high-order bits of an input digital signal. Thus an analog output corresponding to the m high-order bits is obtained. Another controller varies potentials of two variable voltage sources according to a signal of n low-order bits of the input digital signal, while always keeping a potential difference across the three resistor strings constant. Thus an analog output corresponding to the n low-order bits is obtained. This analog output is output to an output terminal.