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:
Oct. 21, 2021
SG Micro Corp, Beijing, CN;
SG MICRO CORP, Beijing, CN;
Abstract
Disclosed in an interface circuit, in which: a current input circuit receives an input current signal of a signal input terminal, an input voltage detection circuit compares an input voltage signal of the signal input terminal with a reference voltage, and provides a detection signal to the current input circuit according to the comparison result, a phase-inversion output circuit is connected with the current input circuit at the first node, and generates a voltage conversion signal according to a voltage potential of the first node, and a buffer circuit performs signal shaping on the voltage conversion signal to obtain an output signal. The current input circuit pulls up the voltage potential of the first node when the detection signal indicates that the input voltage signal is greater than the reference voltage and the input current signal is greater than a reference current.