How does a LM339 work?
LM339 IC compares the values of two inputs against each other. When the AC signal crosses the zero-reference voltage, the output of comparator changes. The diode protects the chip from damage when the input voltage goes below the range specified for common-mode input voltage.
Is IC 339 is a positive variable voltage regulator?
The IC LM399 has positive and negative pins which are pin-3 and pin12 as shown in the circuit. Simultaneously, the voltage supply from the battery will flow through the potentiometer VR1 to the non- inverting terminals (pin5) of the IC.
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 difference between LM324 and LM339?
LM339 is a voltage comparator IC from LMx39x series and is manufactured by many industries. The devices consist of four independent voltage comparators that are designed to operate from a single power supply. What is the difference between LM324 and LM339? The LM324 has a complementary output while the LM339 is open collector.
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.
How is the LM339 connected to the ground?
I’m guessing it’s tied to the ground of your circuit since that’s how the LM339 is typically used. Since LM339 has an open-collector output the HIGH output voltage does not depend on its own supply. You could for example set the LM339 positive supply to just 5V and the HIGH output will still be ~12V when Vin is above 9V.