Invention Grant
US08964904B2 Receiver filter for DC-wander removal in a contactless smartcard
有权
接收器滤波器，用于在非接触式智能卡中移除DC漂移
- Patent Title: Receiver filter for DC-wander removal in a contactless smartcard
- Patent Title (中): 接收器滤波器，用于在非接触式智能卡中移除DC漂移
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Application No.: US13735780Application Date: 2013-01-07
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Publication No.: US08964904B2Publication Date: 2015-02-24
- Inventor: Massimo Ciacci , Remco Cornelis Herman van de Beek , Ghiath Al-Kadi
- Applicant: NXP B.V.
- Applicant Address: NL Eindhoven
- Assignee: NXP B.V.
- Current Assignee: NXP B.V.
- Current Assignee Address: NL Eindhoven
- Main IPC: H04L27/22
- IPC: H04L27/22 ; H04B1/16 ; H04L25/03 ; H04L25/06 ; H04B1/00
Abstract:
Embodiments of a method for processing a baseband signal in a Direct Current (DC)-suppressed system, a system for processing a baseband signal in a DC-suppressed system, and a smart card are described. In one embodiment, a method for processing a baseband signal in a DC-suppressed system involves processing the baseband signal in the analog domain with a first high pass filter (HPF), converting the processed baseband signal to a digital signal, and processing the digital signal in the digital domain with a second HPF to provide a discrete-time differentiation of the baseband signal. Other embodiments are also described.
Public/Granted literature
- US20140192934A1 RECEIVER FILTER FOR DC-WANDER REMOVAL IN A CONTACTLESS SMARTCARD Public/Granted day:2014-07-10
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