Digital current source is nonvolatile


Posted on Sep 18, 2012

Digitally programmable current sources that feature automatic trimming and retain the setting despite power-down cycles are useful in applications such as RF- and laser-communications drivers. The circuit in Figure 1, for example, is particularly suited for setting the drive current for the optical pump in widely tunable VCSELs (vertical-cavity surface-emitting lasers). These lasers are suitable in systems using wavelength-agile DWDM fiber-optic communication links.






Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Delayed pulse generator
Car battery condition checker
Hee-haw-slren
Line-activated-solid-state-switch
Simple Ir Transmitter
Sawtooth and Squarewave Oscillator
Infrared Transmit and Receive
Telemetering Beacon For VUSAT
555 tone generator circuit
One circuit alarm phase



Top