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Signal Integrity Analysis in Wireless SoCs

Posted: 14 May 2007     Print Version  Bookmark and Share

Keywords:signal integrity analysis  wireless SoCs  electrical signal integrity  power supply control 

The growing demand for cheap consumer wireless applications calls for unprecedented levels of integration. Huge digital IPs, such as microprocessors, digital signal processors, or encryption engines, are being assembled together with analogue blocks - e.g. power supply control, data conversion - and radio-frequency (RF) - LNA, VCOs, Mixers. The former generates lots of interfering noise, which gets disseminated through the entire system to finally degrade the operation of the most sensitive circuitry.

The entire electrical signal integrity (ESI) mechanism is very complex. It affects digital operation through IR drop, cross-talk and delay, as well as analogue and RF. For the latter, the impact is rather more complicated as very small noise level will produce dramatic influences at any time - and not only in the neighbourhood of specific signal transitions as occurs in the digital domain.

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