I have tried Howland current source circuit and i achieved 5.2mA constant current over 10-5k load with 12V input voltage and +/-15V supply voltage of op-amp. I have attached the circuit with this.

I am trying to design an op-amp based current source capable of driving a constant current of 600mA RMS at 50 Hz through load resistances between around 0.01 ohms and 2 ohms. I have been playing ...

It will not be affected by the output impedance of the source (sensor). In addition the ideal amplifier will be able to drive any load: supply any current. No real amplifier is ideal, but an op amp ...

Operational amplifiers (op amps) can be used to create (1) precision current sources and sinks, which range from submicroamps to milliamps, and (2) current regulators, which range from milliamps to ...

An op amp has three noise sources: voltage noise (V n) across its inputs and current noise (I n ... Over most of their frequency range, op amps have white (constant spectral density) noise, but at low ...

That was a constant current load, not a constant resistance load. [YS] started with the schematic for the Re:load and made his changes to arrive at this. For him the exercise was just to alter the ...

An ideal voltage source maintains a constant voltage at its two output terminals ... and then boost the output voltage and current to the needed levels by using an op-amp output driver. The next part ...

Current sources provide reliable current levels for electrical component testing and for powering specialized components such as lasers. Current (or power) levels will remain constant during variation ...

For white noise, the spectral density is constant; it is multiplied by ... which compares voltage and current noise noise for several Analog Devices op amp types, for a range of source-resistance ...

For example, you could set the load resistance to 0.1 ohms. The simulator will dutifully show the op amp sourcing 25A of current through the load. Your garden-variety op amp won’t be able to do ...