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AN-395: Interfacing the AD22100 Temperature Sensor to a Low Cost Single-Chip Microcontroller
AN-395: Interfacing the AD22100 Temperature Sensor to a Low Cost Single-Chip Microcontroller

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... To reduce distortion in the output stage, all the transistors are biased ON slightly. This results in class AB operation and reduces the crossover (notch) distortion of the class B stage to a low level, (see performance curve, THD vs AB bias). The potentiometer, RB, from pins 6 – 7 is adjusted to gi ...
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Schmitt trigger



In electronics a Schmitt trigger is a comparator circuit with hysteresis implemented by applying positive feedback to the noninverting input of a comparator or differential amplifier. It is an active circuit which converts an analog input signal to a digital output signal. The circuit is named a ""trigger"" because the output retains its value until the input changes sufficiently to trigger a change. In the non-inverting configuration, when the input is higher than a chosen threshold, the output is high. When the input is below a different (lower) chosen threshold the output is low, and when the input is between the two levels the output retains its value. This dual threshold action is called hysteresis and implies that the Schmitt trigger possesses memory and can act as a bistable multivibrator (latch or flip-flop). There is a close relation between the two kinds of circuits: a Schmitt trigger can be converted into a latch and a latch can be converted into a Schmitt trigger.Schmitt trigger devices are typically used in signal conditioning applications to remove noise from signals used in digital circuits, particularly mechanical contact bounce. They are also used in closed loop negative feedback configurations to implement relaxation oscillators, used in function generators and switching power supplies.
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