What is a constant current generator?
A constant current source (CCS) in electronics is a device/circuit that produces a constant value of current regardless of source voltage or load resistance. 1 illustrates a common CCS circuit using a PNP bipolar transistor. The values of the Ic = Ib * hfe (Beta) of the transistor.
How does a standard constant current generator work?
A magnetohydrodynamic generator directly extracts electric power from moving hot gases through a magnetic field, without the use of rotating electromagnetic machinery. AC generators can be used as sources of steady current with a rectifier and a good ripple filter.
How does constant current work?
A constant current LED driver varies the voltage across the electronic circuit in order to maintain a constant electrical current. This guarantees that no matter the fluctuation in voltage, the current driven to the LED will be maintained at the specified level.
Is current constant in parallel?
Each resistor in parallel has the same voltage of the source applied to it (voltage is constant in a parallel circuit). Parallel resistors do not each get the total current; they divide it (current is dependent on the value of each resistor and the number of total resistors in a circuit).
What is use of constant current source?
A current source is the dual of a voltage source. Active constant current sources are often used in circuits. Often these constant current sources use transistors, although FETs and where applicable, vacuum tunes of thermionic valves can be used as well.
What is an ideal current source?
Definition: An ideal current source is a two terminal device which supplies constant current irrespective of load resistance. The value of current will be constant with respect to time and load resistance. An ideal current source has infinite parallel resistance connected to it.
Why the current is not same in parallel circuit?
The current along the branch with the smallest resistance will be larger than the branch with higher resistance. The total current in the circuit must remain constant (so that charge is not created/lost). So the sum of the currents in the parallel branches will always be equal to the current before the junction.