Hence, we need a common reference point, D, from which we should measure the voltages. But, the voltage divider network remains in place despite the split of voltages. This circuit’s zero-voltage ground reference point will produce negative and positive voltages. Calculate the Resistors R1, R2, R3, and R4 that you would require to obtain -12V, +3.3V, +5V, and +12V voltage levels, respectively. Question: Consider you have an unloaded voltage divider circuit with a 24V DC supply voltage and 60 Watts. The PSU outputs the above voltages from a common reference ground terminal. But, a wide range of applications requires using a single source voltage supply to generate positive and negative voltages.įor instance, a computer power supply unit (PSU) will generate varying output voltages such as +5V, +3.3V, +12V, and -12V. In the former voltage divider circuit described above, we base our output voltages on one zero-voltage ground point. Now, the current across R2 is as follows.ĭeductively, the voltage across R2 equals: Voltage Drop Across R1įirst, we’ll deduce the equation for current across R1 Hence, from Ohm’s law, I = V/ R.īut, R1 current equals R2 current. Remember that in this circuit, the flow of current is in series. Vs = I( R1 + R2) and the current, I = Vs ÷ (R1 + R2). Next, we can factor out the load current I to obtain = Voltage of R1 + Voltage of R2.īut, R1 voltage= I x R1 and R2 voltage = I x R2 since one current flows across both resistors. Using the Ohms law and Kirchhoff’s Voltage Law (KVL), we can evaluate the specific voltage drop for each resistor.Īccording to Kirchhoff, Voltage Law Vs. Hence, we’ll use the ohms law to calculate the voltage drop across each element. They’ll have a common currency across each resistive element as long as they are in a Loop arrangement. #SIMPLE DIVIDER WITH REMAINDER SERIES#Let’s take two resistors, R1 and R2, in a series arrangement. We can also calculate the voltage drop across each resistor via the Voltage Divider Rule. Such a voltage divider features a series combination of two resistors. Resistive Voltage Divider Circuit Diagram Meanwhile, the numerator R2 represents the divider resistor over which you measure the output voltage. The denominators in the equation represent the sum of the two resistance values. The general voltage divider equation is as follows: Also noteworthy, the electric current on either end of the divider remains the same. The difference in the voltage levels (voltage drop) fundamentally relies on the values of the two series resistor values. Hence, the output voltage is of a lower potential difference than the supply voltage. It ensures that there is a voltage drop across a circuit. Primarily, a divider acts as a voltage regulator. What is a Voltage Divider?Ī simple voltage divider features two resistors in a series arrangement. Let us explore more about what is a voltage divider. It is an example of a simple potential divider. Often, in a simple circuit, we use two series resistors to reduce the output voltage.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |