When you connect the gate to the source of a JFET (junction field-effect transistor), it becomes a two-terminal current source. The current that will flow is called IDSS (current, drain-to-source, saturated). One problem you might face is that the IDSS of FETs is quite variable for different parts of the same number. The size of the JFET will determine the rough range of the current, but it does change over temperature. JFETs are depletion-mode devices that conduct until you apply a negative
Register to view the full article
By registering on Electronic Design now, you'll not only gain access to premium content, you'll also become part of an exclusive, robust global engineering community!
Participate in Expert and Reader driven Q&A's
Start your own conversation by commenting on any article or blog
Download high-quality content including the highly anticipated Salary & Career Report