模拟接口的嵌入式设计

kong2008

Introduction
Modern electronic systems are increasingly digital: digital microprocessors, digital
logic, digital interfaces. Digital logic is easier to design and understand, and it
is much more flexible than the equivalent analog circuitry would be. As an
example, imagine trying to implement any kind of sophisticated microprocessor
with analog parts. Digital electronics lets the PC on your desk execute different
programs at different times, perform complex calculations, and communicate by
the World Wide Web.
The electronic world is nearly all digital, but the real world is not. The
temperature in your office is not just hot or cold, but varies over a wide range.
You can use a thermometer to determine what the temperature is, but how do
you convert the temperature to a digital value for use in a microprocessorcontrolled
thermostat? The ignition control microprocessor in your car has to
measure the engine speed to generate a spark at the right time. A microprocessorcontrolled
machining tool has to position the cutting bit in the right place to cut a
piece of steel.
This book provides coverage of practical control applications and gives some
opamp examples; however, its focus is neither control theory nor opamp theory.
Primarily, its coverage includes measurement and control of analog quantities in
embedded systems that are required to interface with the real world. Whether
measuring a signal from a satellite or the temperature of a toaster, embedded
systems must measure, analyze, and control analog values. That’s what this book
is about—connecting analog input and output devices to microprocessors for
embedded applications
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panluko

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deckman

baotong

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libinggl

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kankan

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