Figure 1 A classic LM317 constant current source where: Iout = Vadj/R = 1.25v/Rs. Figure 2 shows another (easier) way to make Iout programmable. The circuit enables control of ampere-scale Iout with ...

For the circuit shown, a maximum current of 20 mA is feasible for a maximum load of 1100 Ohms. Using higher-voltage op amps and larger power transistors can increase these values if cost isn't a ...

The drain current for a “depletion mode” N Channel JFET is given via “Microelectronic Circuits” by Sedra and Smith: I DSS = drain current when V gs = 0. This “maximum” drain current is given in the ...

An RC circuit in series with the coil allows full-current turn-on for reliable relay operation, then reduces the current to save power. Fellow engineer Sanjay R. Chendvankar of Mumbai, India ...