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:
Jan. 21, 2025
Filed:
Jan. 15, 2024
Lapis Technology Co., Ltd., Yokohama, JP;
Hiroshi Tsuchi, Yokohama, JP;
LAPIS Technology Co., Ltd., Yokohama, JP;
Abstract
The disclosure includes: a decoder generating multiple input voltages each having one or the other of two reference voltages selected from multiple reference voltages, using a high voltage digital data signal obtained by increasing the amplitude of a low voltage digital data signal; and a differential amplifier including multiple differential pairs and receiving the input voltages at the non-inverting input terminals of the differential pairs and receiving an output voltage signal at the inverting input terminals to generate an output voltage signal having one of the voltage levels obtained by dividing the two reference voltages into a power of 2. The differential amplifier includes: multiple current sources generating tail currents flowing through the tails of the differential pairs; and multiple clamp transistors provided respectively between the tails of the differential pairs and the current sources and holding a voltage applied to each current source at or below a low voltage.