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Noise coupling in mixed-signal ASICs

Noise coupling in mixed-signal ASICs

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This chapter has summarized practical aspects of key analog and analog/digital interaction problems: Sources of noise; Methods of coupling; Effects of power distribution on chip noise; Effect of substrate referencing on coupled noise; Effects of chip signal isolation/shielding techniques on noise; Effect of package on noise; and Effect of card layout and circuit topology on noise. Techniques related to semiconductor processing; circuit architecture and design; chip floorplanning; chip wiring; design systems; packaging that enhances control or reduction of undesired analog or analog/digital interaction in mixed signal and analog monolithic ICs were surveyed. Consideration was given to substrate coupling, power rail and I/O driver resonances, near field capacitive and inductive as well as package interaction. Spe cial attention was given to distribution of substrate contacts and how the substrate is referenced in highly doped substrates. Actual hardware experiences along with techniques, methodologies, and strategies for analog mixed signal noise reduction were shared. Data results on noise isolation achieved and performance of an actual hardware along with what special techniques were used was discussed. For a more detailed treatment of this subject and software algorithms Reference is an exhaustive treatment of this subject and presents a method for rigorous simulation of the substrate effects.

Inspec keywords: integrated circuit noise; mixed analogue-digital integrated circuits; monolithic integrated circuits

Other keywords: analog mixed signal noise reduction; semiconductor processing; monolithic IC; analog-digital interaction; power rail; I/O driver resonance; mixed-signal ASIC; chip wiring; noise circuit topology; chip signal isolation-shielding technique; noise coupling; chip floorplanning

Subjects: Mixed analogue-digital circuits

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