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This application guide is intended as a source book for the design and application of: Current sources l. Current sinks. Floating current sources. Voltage-to-current converters (transconductance amplifiers) Current-to-current converters (current mirrors)
Here is the basic MOSFET constant-current source: It’s surprisingly simple, in my opinion—two NMOS transistors and a resistor. Let’s look at how this circuit works.
A constant current (CC) converter regulates current the same way: the control loop adjusts the duty cycle to maintain a constant output current regardless of changes to the input voltage and output resistance.
constant current flows through the load for a fixed input volt-age at VIN. This is a constant current source as it is sourcing current to the load. For a negative input voltage at VIN, a similar situation arises except that the Q2 is turned on which causes the current to flow in the opposite direction. For a constant voltage at VIN,
Build this power supply circuit to produce a constant current, no matter the load.
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. Fig. 1 illustrates a simple constant current source (CCS) circuit using a PNP bipolar transistor.
24 Οκτ 2019 · In this we build and test a simple Constant current source circuit using transistor. The circuit used in this tutorial will be able to able to deliver a constant current of 100mA to your load but you can modify it using a potentiometer as per your design requirements.
