Charging a capacitor with constant current results in ... another simulation to see how that works. In this circuit, a PNP transistor sources current. The base voltage is about 0.7 V less than ...

Woodward has offered “PWM-programmed LM317 constant current source,” an intriguing programmable constant current ... Figure 1 A series of LM317 circuits investigated in simulation and on the test ...

Figure 1’s negative constant current source has been a textbook application for the LM337 regulator forever (or thereabouts). It precisely maintains a constant output current (Iout) by forcing the ...