High blood cholesterol levels can cause hardening of the arteries at a younger age. For many people, high cholesterol levels are the result of an unhealthy lifestyle -- most commonly, eating a diet that is high in fat. Other risk factors are heavy alcohol use, lack of exercise, and being overweight.
Freebase(0.00 / 0 votes)Rate this definition: Comparator. In electronics, a comparator is a device that compares two voltages or currents and switches its output to indicate which is larger. They are commonly used in devices such as analog-to-digital converters.
A comparator is a circuit that accepts two voltages, and and outputs zero volts if or outputs a positive voltage level if. Comparators can be built from operational amplifiers. Remember that the gain of the op-amp is extremely large, somewhere on the order of.his means that uncompensated op-amps output voltage as a function of its input voltage will appear as shown in figure 2. The implication inherent is that an uncompensated op-amp can be used to compare two voltages. The two inputs to the circuit are analog voltages.