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. 07, 2021
Filed:
Oct. 19, 2020
Dyna Image Corporation, New Taipei, TW;
Lite-on Semiconductor Corp., Taipei, TW;
Peng-Han Chan, New Taipei, TW;
Chun-Hsien Lin, New Taipei, TW;
Sheng-Cheng Lee, New Taipei, TW;
Wen-Sheng Lin, New Taipei, TW;
Yu-Cheng Su, New Taipei, TW;
Dyna Image Corporation, New Taipei, TW;
Lite-On Semiconductor Corporation, Taipei, TW;
Abstract
A digital device is provided. The digital device uses three states, including a ground (GND) state, a voltage (VDD) state, and a FLOAT state. On designing a chip, two storage units and a pad circuit are set inside; the pad circuit comprises a current limiter and two switches; and less ports contained are required than the conventional. That is, one port obtains three states. As comparing to the conventional having only two states, the present invention uses the port connected with two storage units in the pad circuit for obtaining the three states; a circuit featuring 'pull up' and 'pull down' is used to identify the state of connection of the port; and the port determines a plurality of definitions through the three states of GND, VDD and FLOAT. Thus, a pad is saved for reducing the space and cost of the chip.