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. 13, 2020
Filed:
Mar. 07, 2019
Powerchip Semiconductor Manufacturing Corporation, Hsinchu, TW;
Tomofumi Kitani, Tokyo, JP;
Powerchip Semiconductor Manufacturing Corporation, Hsinchu, TW;
Abstract
A comparator () compares a pad voltage with a reference voltage (Vref) to output a voltage (VCCOK), and a comparator () compares a low voltage with a reference voltage (Vref) to output a voltage (VDDOK). A power-on circuit () includes a timer circuit () and starts a reference voltage generation circuit () after the power switch control circuit is started, and then starts the comparator (). After the comparator () is started, a controller () starts a voltage down converter () when the voltage (VCCOK) is at the H level, and turns on a MOS transistor (Q) when the voltage (VCCOK) is at the L level. A power-on circuit () includes a timer circuit () and starts a reference voltage generation circuit () after the voltage down converter () is started, and then starts a comparator (). After the comparator () is started, the controller () enters the standby state.