What exactly is a current source?
A current source is a circuit that has an ideally infinite output resistance; as you said, it gives (if possible) the same current no matter what it's connected to.
How to make a constant current source
Feb 19, 2014 · 10 I don't understand current sources! Batteries are voltage sources, but how does one actually implement a current source? I was looking at current mirrors to see how they work, and I …
Constant current source with transistor - Electrical Engineering Stack ...
Jan 18, 2024 · I have this circuit that should describe a constant current source. From my point of view the pnp-transistor has to work in its saturation mode. Thus the potential on the emitter should be …
power supply - How should I design variable current source of 4-20 mA ...
Jun 18, 2024 · 7 I am trying to design current source of 4-20 mA variable with 24 V DC input. The circuit can read one output at a time and variable from 4 to 20 mA. When input varies between 0 and 24 …
operational amplifier - Voltage controlled current source design ...
Oct 25, 2024 · I'm working on a project where I need to design a bipolar current source controlled by a sinusoidal voltage between -1.25 V and 1.25 V. It has to deliver a maximum bipolar sinusoidal signal …
operational amplifier - How can I create 4-20 mA current souce ...
May 4, 2024 · 3 I have one op amp based circuit that converts 4-20 mA from current sensor into 5-9 V DC. Right now I don't have any such sensor to test this circuit. I want to create new circuit that …
operational amplifier - How do we create current sources? - Electrical ...
Feb 2, 2020 · Many specific circuit solutions of current sources are discussed in other questions. But it is interesting to see the general ideas on which they are based… the “philosophy” behind them. If we …
Getting Thévenin equivalent when there's a current source only
Mar 28, 2020 · The first one is using source transformation. The 2A current source and the 10 ohms resistance in parallel can be replaced by a voltage source of 20 volts and a series resistance of 10 …
What is the basic idea behind the so-called "improved Howland current ...
Apr 7, 2024 · The circuit can be considered as a constant current source with dynamic voltage that follows the load voltage. R1 ÷ R4 and the op-amp form an op-amp differential amplifier acting as a …
operational amplifier - Op-Amp with current source input - Electrical ...
May 1, 2022 · Question 1 I am slightly confused about how the current flows in this circuit. By the principle of virtual ground, the inverting input is at 0V. The output is at some negative voltage. Hence …