What is a voltage-controlled current source?
In a voltage-controlled current source circuit, as the name implies, a small amount of voltage across the input will proportionally control the current flow across the output loads. This type of circuit is commonly used in electronics to drive current-controlled devices like BJT, SCR, etc.
How can voltage and current be controlled?
The current in a circuit is directly proportional to the electric potential difference impressed across the circuit and inversely proportional to the resistance of the circuit. Reducing the current can be done by reducing the voltage (choice A) or by increasing the resistance (choice D).
How does a current controlled current source work?
A controlled or dependent current source on the other hand changes its available current depending upon the voltage across, or the current through, some other element connected to the circuit. In other words, the output of a dependent current source is controlled by another voltage or current.
Is current dependent on voltage?
The amount of current in a circuit depends on the amount of voltage and the amount of resistance in the circuit to oppose current flow. For this reason, the quantities of voltage and resistance are often stated as being “between” or “across” two points in a circuit.
Is current directly proportional to voltage?
This is now known as Ohm’s Law. One way Ohm’s Law can be stated is: “a current flowing through a conductor is directly proportional to the voltage, given the temperature of the conductor remains constant”. Therefore, if the resistance is kept constant, then doubling the voltage doubles the current.
What is the source of voltage in a circuit?
A voltage source, such as a battery or generator, provides a potential difference (voltage) between two points within an electrical circuit allowing current to flowing around it.
What is an example of voltage source?
A voltage source is a two-terminal device whose voltage at any instant of time is constant and is independent of the current drawn from it. The example of voltage sources is batteries and alternators.
Can current flow without a voltage source?
Voltage is the Cause, Current is the Effect Voltage attempts to make a current flow, and current will flow if the circuit is complete. It is possible to have voltage without current, but current cannot flow without voltage.