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:
Apr. 28, 2026
Filed:
Jan. 18, 2024
Lapis Technology Co., Ltd., Yokohama, JP;
Hiroshi Tsuchi, Yokohama, JP;
LAPIS Technology Co., Ltd., Yokohama, JP;
Abstract
The disclosure includes: a differential amplifier, and a first decoder assigning and supplying a first or second voltage to each of a plurality of input terminals based on (K+1) bits of digital data. The differential amplifier includes 2differential pairs each driven by a tail current received individually, and a tail current control circuit supplying first to 2tail currents to the 2differential pairs and controlling first to 2current ratios for the first to 2tail currents based on the digital data. The tail current control circuit has a basic configuration that sets each of the first to 2current ratios to a maximum value, a minimum value, or an intermediate value among three predetermined values, and increases one of the maximum and minimum values and decreases the other for the current ratio of the tail currents supplied to two predetermined differential pairs.