Series of circuit analysis above we can see that the source voltage U is divided into three in the third resistor, namely U1, U2, and U3. Where great each tense are:
U1 R1 = I.
U2 = I. R2
U3 = I. R3
From this fact, it is a composition of two or more resistors are connected in series commonly referred to as a voltage divider circuit (voltage devider). Note the voltage divider circuit follows:
Figure 3.28 Circuit Voltage Divider
Usually this circuit is used to obtain the desired voltage from a voltage source which is great. The following series of images shows the simplest form a voltage divider circuit, which is desirable to obtain the output voltage vo, which is part of the voltage source V1 by placing two resistors R1 and R2. It appears that the current i flowing through R1 and R2, so that:
VI = V0 + VS
VS = I x R1
V0 = I x R2
VI = IxR2 + IxR1
If V0 and VS mutually shared, obtained:
V0 / V1 = R2 / R1
From here it can be seen that the input voltage VI is divided into two parts, namely V0 and VS, respectively proportional to the price of the resistor is subjected to stress. Obtained from the equation:
V0 = VI x (R2 / (R1 + R2)
A voltage divider circuit is very important as a basis untukmemahami DC circuit or an electronic circuit that involves berbagaikomponen more complicated.
3:29 image combination circuit applications in Refrijerator