Current Controlled Voltage Source
Current Controlled Voltage Source - Related Videos
01:25
Multiple Voltage Sources
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Generally, a single battery is not enough to power some devices. In such cases, batteries can be combined in two ways: in series or in parallel. In series, the positive terminal of one battery is connected to the negative terminal of another battery. Hence, the voltage of each battery is added to give the net voltage, which is increased because each battery boosts the electrons that enter it. The same current flows through each battery because they are connected in series. Batteries are...
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Nodal Analysis with Voltage Sources
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Nodal analysis is a remarkably effective method used in electrical engineering to simplify the analysis of complex circuits, including those with dependent or independent voltage sources. Its strength lies in its systematic approach to breaking down circuits into manageable components, making it easier for engineers to understand and solve. Consider a circuit that contains four resistors and two voltage sources, as shown in Figure 1. One of these voltage sources is connected between a...
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Generator voltage control is crucial for maintaining the stable operation of synchronous generators and wind turbines. In older models, a DC generator driven by the rotor delivers DC power to the rotor's field winding, and the power is transferred through slip rings and brushes. In the latest models, static or brushless exciters are used. Static exciters rectify AC power from the generator terminals and then transfer the DC power directly to the rotor. Brushless exciters, on the other hand, use...
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Mesh Analysis with Current Sources
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Mesh analysis becomes simpler when analyzing circuits with current sources, whether independent or dependent. The presence of current sources reduces the number of equations required for analysis. Two cases illustrate this: Current Source in One Mesh: The analysis process is straightforward when a current source is found in only one mesh within the circuit. Mesh currents are assigned as usual, with the mesh containing the current source excluded from the analysis. Kirchhoff's voltage law (KVL)...
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Voltage-Dependent Potassium Current Recording on H9c2 Cardiomyocytes via the Whole-Cell Patch-Clamp Technique
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Cited by 1 •
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The present protocol describes an efficient method for the real-time and dynamic acquisition of voltage-gated potassium (Kv) channel currents in H9c2 cardiomyocytes using the whole-cell patch-clamp technique.
FAQs
The output voltage changes in direct proportion to the designated control current, according to Vout = rmIcontrol. The transresistance gain, rm, sets how much voltage results from each unit of current and is measured in ohms. Consequently, increasing the controlling current increases the modeled voltage response proportionally, while the sign of the current determines the response direction within the circuit convention.
Transresistance gain, represented by rm, is the scaling parameter that connects a controlling current to the resulting voltage. Its unit, the ohm, reflects the voltage-per-current relationship in the model. Changing rm changes the magnitude of the predicted output without changing which branch supplies the controlling current, allowing circuit analysis to represent devices with different current-to-voltage responses.
The controlling current is measured in a specified branch elsewhere in the circuit, so its value depends on the surrounding network rather than on the output voltage alone. Identifying that branch establishes which current enters the relationship Vout = rmIcontrol. This prevents assigning the wrong circuit current to the model and supports consistent analysis of interconnected networks.
An independent voltage source has a prescribed voltage value, whereas this dependent model changes its voltage in response to a current elsewhere in the circuit. Its output therefore cannot be evaluated without considering the controlling branch and the transresistance gain. This distinction makes the model useful for representing signal-controlled behavior rather than fixed-voltage behavior.
First, locate the designated branch and determine its controlling current. Next, identify the transresistance gain rm and use Vout = rmIcontrol to calculate the dependent voltage. Finally, include that voltage relationship with the remaining circuit equations to solve the interconnected network. This workflow helps predict voltage responses while preserving the influence of surrounding components.
Engineers use these models when a circuit's voltage response depends on a current signal elsewhere in the network. They can represent transresistance amplifiers and other dependent devices, helping analysts predict responses before implementing a detailed design. The models also simplify complex electronic systems by capturing the relevant current-to-voltage behavior within an interconnected circuit representation.