Dependent current source Definition and 20 Threads

A current source is an electronic circuit that delivers or absorbs an electric current which is independent of the voltage across it.
A current source is the dual of a voltage source. The term current sink is sometimes used for sources fed from a negative voltage supply. Figure 1 shows the schematic symbol for an ideal current source driving a resistive load. There are two types. An independent current source (or sink) delivers a constant current. A dependent current source delivers a current which is proportional to some other voltage or current in the circuit.

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  1. Y

    Nodal Analysis and Two Dependent Current Sources

    Hello, I came up with a circuit that has two independent voltage-controlled current sources. I want to calculate voltage gain: ##G_{U} = \frac{U_{2}}{U_{1}}##. Moreover, I want to practice the nodal method at the same time. Below I'm sending schematic with marked nodes V1, V2, V3 and V4. I...
  2. S

    Three-part Problem: Thevenin + Dependent current source

    Homework Statement The diagram of the electric circuit, the problem statement (and an attempt) are included in the file below.: https://www.docdroid.net/RD0ZEgA/question-3.pdf Homework Equations Dependent Current Source Nodal analysis Short Circuit Current Thevenin Voltage Thevenin...
  3. B

    KCL Problem with Dependant sources

    Homework Statement I'm trying to find the voltage drop V1 of the following circuit, assuming Vin=1v, and for the life of me can't seem to get the right answer. Homework Equations KCL, Ohm's law The Attempt at a Solution I basically tried to use KCL at the top node, Vin/2+2V1 = V1/3 +...
  4. dep0

    What is the Voltage Drop across a dependent current source?

    Hello, I want to calculate the Thevenin/Norton equivalent of a circuit with a dependent current source. I tried to analyse the circuit using loop equations but i don't know how to calculate the voltage drop across the current source. Any help would be appreciated.
  5. J

    Engineering Circuit Theory Question KCL and Dependent Sources?

    Homework Statement I need to find the voltages (if any) and currents of these circuit, but particularly Io I do know that I have to use KCL bot I don't know how, can somebody help me with a node or somethinghttps://www.physicsforums.com/attachments/c2-jpg.80412/ I do not have any other info...
  6. G

    Find Maximum Power to Resistor R

    Homework Statement Homework Equations Pmax = ((VTh)2)/(4RTh) Rparallel = (R1R2)/(R1 + R2) KCL ΣI = 0 KVL ΣV = 0 The Attempt at a Solution Okay, so to find RTh, I remove all independent sources and set the "terminals" at R to have a 1A current running through them. Since there is a 30kΩ...
  7. gfd43tg

    Thevenin equivalent with dependent current source

    For this problem, I added in an external source, and found an expression for the external current in terms of ix. Then I divided Vex/iex to get the Rth. Then I did superposition to find the Vth. I had some troubles getting rid of the extra currents, particularly i3 and i2. I was wondering if...
  8. X

    Voltage dependent Current source

    Homework Statement Find Vout at t=0.782s (I already found Vout at t=0 s. It is 0 V.) Homework Equations V=IRThe Attempt at a Solution First I found Vs = 9*sin(14*0.782)=-8.989817V (with t in radians) Since Rpi is in parallel with the Vs, its voltage Vpi also equals to -8.98917 V. Since the...
  9. D

    Superposition with a dependent current source

    Homework Statement I uploaded the assignment it is problem 2 Homework Equations The Attempt at a Solution I really just want confirmation that my work is ok, and the command for a dependent current source in PSpice. The things that I found that are dependent, are very confusing...
  10. C

    Find the Thevenin resistance for network with dependent current source

    Homework Statement http://imageshack.us/a/img15/7218/sg2prob11.jpg Find the Thevenin resistance for the network(Sorry for the bad drawing, but that is a point like point / node A on the bottom where it's going out too and likely part of the load too, with a wire connected to the circuit, I'll...
  11. C

    Dependent current source, find Vo

    Homework Statement http://imageshack.us/a/img26/4592/homeworkprintprob.jpg Find the voltage V0 in the network.Homework Equations V = IR Voltage Division: (Voltage across series resistor) = [(resistance) / total series resistance)](total input V) Current Division (for 2 parallel resistors)...
  12. N

    The amount of power supplied/received by the dependent current source

    Homework Statement http://imgur.com/jsIWS Homework Equations Ʃ V_{n} = 0 Ʃ I_{n} = 0 v = ir The Attempt at a Solution I combined the two 2Ω resistors into a single 4 Ω resistor because they're in series. Then I tried to use KCL but I got 2 unknowns in one equation. 0.2A + \frac{Vi}{4} = I
  13. K

    Engineering Thevenin equivalent circuit with dependent current source

    Homework Statement Find the thevenin equivalent circuit of the circuit to the left of the terminals AB. Circuit diagram is attacted below. Homework Equations The Attempt at a Solution I know that the thevenin resistance is 1kohm. I also know that the thevenin voltage is the voltage across...
  14. A

    Engineering Help! Stuck on Dependent Current Source Problem

    I am stuck with this problem,the dependent current source is creating a big problem for me, please help. I have attached the problem.
  15. I

    Voltage drop over dependent current source?

    I have a circuit with 3 meshes for which I have to find the mesh currents, and I have. However, I just thought that there might be a voltage drop over the dependent current source in the circuit, which would change the mesh current equations. The CCCS is shared by two meshes. When I did the...
  16. J

    How Do You Calculate Current and Power in a Circuit with a Dependent Source?

    Homework Statement In the circuit above, use R1 = 4Ω, R2 = 3Ω, V0 = 10V, and k = 1/5 Find the value of ix Find the power delivered by the dependent source 2. The attempt at a solution So what I assumed was that Ix+kIa=Ia so k=1/5 so Ix=(4/5)Ia then the equation for Ix would be Ix +...
  17. M

    How Do You Solve a Circuit with a Voltage Dependent Current Source?

    Voltage dependent current source? Please help Homework Statement Attached the problem. Homework Equations ?? The Attempt at a Solution Tried to Use KCL, not sure what else to do.
  18. G

    Voltage controlled dependent current source

    I had a question. When you have a circuit with a independent current source and a voltage dependent current source. And the dependent current source is dependent on the Voltage drop across the independent current source. How do I solve for this voltage drop when the currents are in parallel...
  19. W

    Circuit with Dependent Current Source

    Homework Statement I'm not sure how to solve this question, the method you're supposed to use is nodal analysis. Homework Equations The Attempt at a Solution I tried to use KCL at node A, so I have (12-Va)/8 - 3Va =0 Once I solved Va, the current is 3*Va. However, I'm not...
  20. E

    Node method analysis with dependent current source annoying me

    I've been trying to solve the exercise 4 below,but with no avail.I've worked through the equations,which I think that are okay, but I'm not sure because the result doesn't match with the one that is provided.Could you help me and check if those equations are okay?Also,how do I work with...
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