Control circuit for a junction field effect transistor

摘要

The field effect transistor (T1) has a connections for a gate (G), drain (D) and source (S), a gate leakage current and a maximum permissible gate current. The circuit has a current source (Q) supplying the gate that produces a control current for switching off the field effect transistor (FET) that is greater than the gate leakage current and smaller than the maximum permissible gate current.