Model
Digital Document
Publisher
Florida Atlantic University
Description
The use of digital circuits in incre asingly diverse applications
and environments has greatly increased the probability
of electromagnetic interference in digital machines. The
source and control of noise in digital systems have become
major considerations in hardware design. This paper addresses
these problems and their solutions. The noise immunities of
various semiconductor families are compared showing design
tradeoffs. The effects of transmission line reflections on
digital wave forms are analyzed. The means for calculating
interference between conductors (crosstalk) are shown with
appropriate approximations. The effects of shielding conductors
and circuitry are explored with formulas for near field
calculations shown. Proper grounding and power supply decoupling
methods are shown to be paramount to proper system design.
The paper ends with an approximate noise analysis of a simple
computing machine.
and environments has greatly increased the probability
of electromagnetic interference in digital machines. The
source and control of noise in digital systems have become
major considerations in hardware design. This paper addresses
these problems and their solutions. The noise immunities of
various semiconductor families are compared showing design
tradeoffs. The effects of transmission line reflections on
digital wave forms are analyzed. The means for calculating
interference between conductors (crosstalk) are shown with
appropriate approximations. The effects of shielding conductors
and circuitry are explored with formulas for near field
calculations shown. Proper grounding and power supply decoupling
methods are shown to be paramount to proper system design.
The paper ends with an approximate noise analysis of a simple
computing machine.
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