Transistor devices for microwave oscillator elements

Claim 1

In a transistor device for use in oscillating an electric signal at a frequency comprising a transistor chip having three electrodes and a package having three terminals corresponding to the three electrodes, said transistor chip being encapsulated within said package, a control electrode of the three electrodes of said transistor chip being connected to a first of the three terminals by a bonding wire within said package, an output electrode of the three electrodes being coupled with a second of three terminals, the transistor device having an input impedance reviewed from the first terminal as an input terminal at said frequency, the improvement which comprises an insulator plate means fixedly mounted adjacent said transistor chip within said package, and a conductor element supported on said insulator plate means and having opposite ends which are connected to said output electrode and said second terminal of said package, respectively, to connect said output electrode and said second terminal, said conductor element having substantially higher inductance in comparison with that of the bonding wire connected between said control electrode and said first terminal so that said input impedance of said transistor device has a negative resistance characteristic with a reduced phase rotation at said frequency which has no relation to an external circuit connected to said second terminal of the package.