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:
Aug. 25, 2009
Filed:
Jun. 28, 2004
Tsuyoshi Toyoshima, Hino, JP;
Tomoyuki Shirasaki, Higashiyamato, JP;
Katsuhiko Morosawa, Tachikawa, JP;
Tsuyoshi Toyoshima, Hino, JP;
Tomoyuki Shirasaki, Higashiyamato, JP;
Katsuhiko Morosawa, Tachikawa, JP;
Casio Computer Co., Ltd., Tokyo, JP;
Abstract
A current generation supply circuit which supplies drive currents corresponding to digital signals for a plurality of loads comprising a current generation circuit which supplies output currents to the loads as the drive currents comprising a reference voltage generation circuit in which reference current having a constant current value is supplied and generates reference voltages based on the reference current; a drive current generation circuit which generates the output currents having current value ratios corresponding to the digital signals relative to the reference current based on the reference voltages; and a characteristic control circuit which sets the ratio of the output currents relative to the reference current. The characteristic control circuit sets the ratio of the output currents for the loads relative to the reference current in a plurality of stages or set so that the ratio of the output currents relative to the reference current can be altered for each of every load depending on the setting of the drive characteristic for each load.