Analog Interfacing to Embedded Microprocessor Systems, 2nd Edition

example, a temperature control system might have a 1



deadband, where the

output is not changed if the temperature is within 1



of the setpoint. If the heater

is on, it won’t go off until the temperature is 1



above the setpoint. The heater

won’t go back on until the temperature is 1



below the setpoint. In some systems,

a dead band is part of the basic physics. For example, the thermostat in most

houses lags the actual temperature slightly, so the thermostat will sense the

temperature continuing to rise after it has reached setpoint and turned the heater

off. In actuality, the thermostat is just catching up with the actual room tempera-

ture.

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