Title :
Optimized decoupling concepts for digital VLSI circuits
Author :
Held, Joachim ; Wolf, Thomas
Author_Institution :
Siemens AG, Munich, Germany
Abstract :
A very common approach to reduce conducted and radiated emission caused by VLSI-circuits is using blocking capacitors at the noise-sources together with a sandwich consisting of a power- and a ground-plane. This paper shows the disadvantages of this approach and how to improve it by feeding the supply current through short pieces of microstrip or coplanar lines. In addition coils embedded in the PCB (printed circuit board) are used. These measures are improvements of the work presented by L.P. Janssen (1999). A strong reduction of RF-(radio-frequency)-disturbances along the supply system has been measured together with a reduced emission of radiation
Keywords :
VLSI; coplanar transmission lines; digital integrated circuits; interference suppression; microstrip lines; printed circuits; radiofrequency interference; PCB; RF-disturbances reduction; blocking capacitors; coplanar lines; digital VLSI circuits; embedded coils; ground-plane; microstrip; noise-sources; optimized decoupling concepts; power-plane; printed circuit board; radiated emission; radio-frequency disturbances reduction; reduced radiation emission; supply current feeding; Capacitors; Circuits; Coplanar transmission lines; Current supplies; Frequency; Microstrip; Power transmission lines; Resonance; Transmission line theory; Very large scale integration;
Conference_Titel :
Electromagnetic Compatibility, 2001. EMC. 2001 IEEE International Symposium on
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-6569-0
DOI :
10.1109/ISEMC.2001.950503
