Patent ID: 8872191

Claim:
An electronic circuit device comprising: (a) a silicon carbide-based normally-off type junction FET having a gate electrode, a source electrode, and a drain electrode; and (b) an element or an element group inserted between the gate electrode of the normally-off type junction FET and a gate drive circuit, wherein the element or the element group, in which elements have been coupled in parallel to each other, includes a capacitor and a diode whose anode is coupled to the gate electrode and whose cathode is coupled to the gate drive circuit, but does not include other parallel-coupled elements, and wherein the junction FET has been formed in a semiconductor chip and the semiconductor chip comprises: (x1) a gate electrode of the junction FET; (x2) a gate pad of the junction FET; and (x3) an insulating film configuring, between the gate electrode and the gate pad, a capacitor together therewith.