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:
Oct. 28, 2025
Filed:
Sep. 03, 2024
Synaptics Incorporated, San Jose, CA (US);
Yutaka Saeki, Kanagawa, JP;
Synaptics Incorporated, San Jose, CA (US);
Abstract
A current source circuit includes a plurality of current generation subcircuits and an operational amplifier. Each of the plurality of current generation subcircuits includes an output transistor having a drain through which an output constant current is generated, a resistor coupled between a first constant voltage node and a source of the output transistor, and a storage capacitor coupled between the first constant voltage node and a gate of the output transistor. The operational amplifier has a first input coupled to a second constant voltage node, a second input selectively couplable to the source of the output transistor, and an output selectively couplable to the gate of the output transistor.