ECE155 Lecture Notes - Lecture 7: Apidae, Embedded System, Computer

• School: University of Waterloo
• Department: Electrical and Computer Engineering
• Course: ECE155
• Professor: Jeff Zarnett

Document Summary

Embedded systems differ from general-purpose computers; their interactions with the outside world is much more important. Convert input from the external environment into a form suitable for use by a. Convert from analog ad continuous time to digital and discrete time computer system: light sensor might represent intensity as an analog voltage, computer needs a stream of bits. Has approximate conversions and will lose information if the samples are too infrequent or if the samples don"t capture enough information (i. e. resolution is too poor) Digital signal is a finite set of pairs, each of which contains a sample and a time for that sample. Convert output from the computer system into some effect on the. Require analog voltage signals; feed the discrete time data to a digital to environment analog converter. Embedded control program on an embedded system monitors sensor inputs.