A logic signal has a true to percent rise time of

PHYSICS · Multi-part · Fermi University Physics · Electronics, Instrumentation & Communication · Circuit foundations and passive networks · Circuit foundations and passive networks

Electronics for Measurement, Ch The bench: probes, cables, grounds and what the instrument shows

Problem

A logic signal has a true

10

90

percent rise time of

6.0\,\mathrm{ns}

. It is displayed on an oscilloscope specified as

60\,\mathrm{MHz}

bandwidth (

-3\,\mathrm{dB}

). ((a)) Estimate the oscilloscope's own rise time from its bandwidth. ((b)) Estimate the rise time that will be displayed, and by what percentage it overstates the true rise time.

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