At first glance, [RobBest]’s constant current source looks old school. The box is somewhat old-fashioned, featuring switches and binding posts. Most importantly, there’s a large analog meter ...

Download this article in PDF format. High-brightness visible-light LEDs (VLEDs) require a constant-current source. This simple, RFI-free circuit takes advantage of the normally-on properties of ...

A current source provides electrical energy with a constant current. The implication is that if the resistance of the load changes the current source will vary the voltage to compensate.

Even without the capacitor, the time constant and non-linear nature of the design idea’s (DI’s) PWM-driven circuit has limitations if used as a source of AC signals. Of course, the title of the DI ...

A cascode-connected pair of JFETs, Q1 and Q2 , form a constant-current source that minimizes the reference circuit's sensitivity to supply-voltage fluctuations and extends IC1 's operating voltage ...

Inside, there is a precision 10-µA current source and a voltage-follower circuit (see the figure). The terminal designations are INPUT, SET, and OUT. The current source is between the INPUT and SET.

The LED driver circuit is a buck (stepdown) solution and the circuit presented here can operate from most any input voltage source as long as it exceeds the forward voltage of the LEDs to be driven. A ...

Instead, in this case, analogue and digital blocks are built from actively-controlled 12V enhancement-mode GaN hemts, combined with the pull-up effect of 12V depletion-mode GaN hemts used as ...