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:
Dec. 13, 2022
Filed:
May. 31, 2021
Realtek Semiconductor Corp., Hsinchu, TW;
Han-Hsiang Huang, Hsinchu, TW;
REALTEK SEMICONDUCTOR CORP., Hsinchu, TW;
Abstract
A voltage reduction circuit for a bandgap reference voltage circuit is provided, and the voltage reduction circuit includes a first transistor, a current mirror circuit, a voltage dividing circuit, an output resistor, and a fourth transistor. The first transistor receives an initial bandgap reference voltage from the bandgap reference voltage circuit. The voltage dividing circuit has a voltage dividing node for outputting a first dividing voltage. The fourth transistor receives the first divided voltage. The current mirror circuit forms a first current on the voltage dividing circuit through the first transistor, and mirrors the first current to the output resistor to form a second current. The voltage dividing circuit and the output resistor each have a first temperature characteristic, the first transistor and the fourth transistor each have a second temperature characteristic, thereby generating, a reference voltage independent of temperature and lower than the initial bandgap reference voltage.