
Precision resistors, networks, and trimmers
An Introduction to Current Sources
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rails (which can range from between 3 and 15 volts), without phase inversion or cata-
strophic failure.
As you can see, current sources play a vital role in the operation and overall perfor-
mance of all of today’s analog semiconductors, no matter the type or the process by
which they are made. The challenge for the analog IC designer becomes increasingly
more difficult as desired voltage operation gets ever closer to the 1-volt level (as with
digital designs), along with a miserly power consumption, good precision, and increased
bandwidth—characteristics that are alwa ...