Title :
Low EMI design of a microprocessor based password access control system-a case study
Author :
Kundu, S. ; Deb, G.K. ; Sengupta, S. ; Saha, U.K.
Author_Institution :
Electron. Res. & Dev. Centre of India, Calcutta, India
Abstract :
For obtaining an ISO 9000 quality system, EMC is essential for today´s equipment manufacturers. This paper discusses the EMI in the printed circuit board level of an “access control system” consisting mainly of a microprocessor and its logic circuits and the switched mode power supply. This paper also addresses the fact that in reality cables or PCB tracks are good transmitting and receiving antennas and hence aspects of PCB grounding and shielding are considered. The paper also deals with some aspects of EMC compliance testing at the equipment level, both for conducted and radiated emissions and results are presented graphically
Keywords :
ISO standards; biometrics (access control); conformance testing; earthing; electromagnetic compatibility; electromagnetic interference; electromagnetic shielding; microprocessor chips; printed circuit design; printed circuit testing; EMC compliance testing; ISO 9000 quality system; PCB grounding; PCB tracks; cables; conducted emissions; logic circuits; low EMI design; microprocessor based password access control system; printed circuit board level; radiated emissions; receiving antenna; shielding; switched mode power supply; transmitting antenna; Access control; Control systems; Electromagnetic compatibility; Electromagnetic interference; Logic circuits; Manufacturing; Microprocessors; Printed circuits; Quality management; Switched-mode power supply;
Conference_Titel :
Electromagnetic Interference and Compatibility '97. Proceedings of the International Conference on
Conference_Location :
Hyderabad
Print_ISBN :
81-900652-0-3
DOI :
10.1109/ICEMIC.1997.669820
