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When to use LM339 as a voltage comparator?
LM339 (Quad differential comparator) consist of four independent voltage comparators. It is a common integrated circuit and is mainly used in high-voltage digital logic gate circuits. Using LM339 can easily form various voltage comparator circuits and oscillator circuits.
When does the led go off on a LM339?
And the LED will be off when the voltage at the noninverting terminal is greater than at the inverting terminal. With an LM339, since it has 4 op amps (it is a quad op amp comparator), an engineer can use the 4 op amps to compare 4 values.
Where does the positive voltage go in a LM393 chip?
One pin is Vcc, where the positive voltage connects to and the other is GND, where either gets hooked up to GND or negative voltage. This serves a dual purpose. This gives the LM393 power so that the chip can work. And secondly, the voltage that is fed into these power pins serve as circuit biasing.
What is the output of the LM339 transistor?
The output of the LM339 is the uncommitted collector of a grounded-emitter NPN output transistor. Many collectors can be tied together to provide an output OR ing function.
Why are all pins tied to the negative supply in LM339?
All pins of any unused comparators should be tied to the negative supply. The bias network of LM339 establishes a drain current which is independent of the magnitude of the power supply voltage over the range of from 2 V to 30 V. It is usually unnecessary to use a bypass capacitor across the power supply line.
Is the bias network of LM339 independent of the voltage?
The bias network of LM339 establishes a drain current which is independent of the magnitude of the power supply voltage over the range of from 2 V to 30 V. It is usually unnecessary to use a bypass capacitor across the power supply line. The differential input voltage may be larger than V+ without damaging the device.
What is the working principle of the LM339 IC?
Here we will discuss the Introduction to LM339 Voltage Comparator IC, Pin Diagram, Working Principle of LM339 IC, Features, LM339 IC Equivalent IC, Different Packages, and its Applications. LM339 is one of the voltage comparator IC in the LMx39x IC series. It is a 14-pin IC, that consists of four independent voltage comparators.
What is the output value of a comparator?
A comparator is an electronic circuit, which compares the two inputs that are applied to it and produces an output. The output value of the comparator indicates which of the inputs is greater or lesser. Please note that comparator falls under non-linear applications of ICs.