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:
Aug. 11, 2020
Filed:
Sep. 24, 2019
Samsung Electronics Co., Ltd., Suwon-si, Gyeonggi-Do, KR;
Kyeong-Do Kim, Seoul, KR;
Jun-Ho Kim, Seoul, KR;
Samsung Electronics Co., Ltd., Suwon-si, Gyeonggi-do, KR;
Abstract
A reception circuit of an NFC card, includes, an input circuit, a reference voltage generator, a comparison circuit and a reference voltage controller. The input circuit receives a wireless signal including pauses and generates an envelope voltage signal. The reference voltage generator generates a detection reference voltage and a selection reference voltage based on the envelope voltage signal and a voltage selection signal. The selection reference voltage varies depending on a minimum voltage level of the pauses. The comparison circuit generates a pause detection signal and a synchronization signal by comparing the envelope voltage signal with the detection reference voltage the selection reference voltage, respectively. The reference voltage controller adjusts a control value of the voltage selection signal based on the pause detection signal and the synchronization signal such that the selection reference voltage is changed depending on the control value of the voltage selection signal.