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. 17, 2013
Filed:
Dec. 11, 2009
Hyun Soo Park, Seoul, KR;
Byeong Cheon Jeong, Suwon-si, KR;
Kyung Hoon Kim, Seoul, KR;
Yeon Seok Song, Seongnam-si, KR;
Min Gyu Maing, Seoul, KR;
Hong Chul Lee, Seongnam-si, KR;
Hyun Soo Park, Seoul, KR;
Byeong Cheon Jeong, Suwon-si, KR;
Kyung Hoon Kim, Seoul, KR;
Yeon Seok Song, Seongnam-si, KR;
Min Gyu Maing, Seoul, KR;
Hong Chul Lee, Seongnam-si, KR;
Samsung SDS Co., Ltd., Seoul, KR;
Abstract
A power interface circuit of a contact integrated circuit (IC) card reader is provided. The power interface circuit includes a power control unit configured to invert, amplify and output a power control signal supplied from the outside, a switching diode unit configured to control on and off operations of a ground terminal transistor in a complementary transistor unit in response to an output signal of the power control unit, the complementary transistor unit in which complementary transistors transfer a power supply terminal voltage to a power output unit or mute a card power supply terminal of the power output unit to a ground voltage level while operating inversely to each other in response to a control signal directly input from the power control unit and a control signal input through the switching diode unit, and the power output unit configured to output a voltage input through the complementary transistor unit to a card power supply terminal of an IC card or maintain the card power supply terminal at the ground voltage level in response to operation of the complementary transistor unit.