| 摘要 |
PURPOSE:To obtain high output in a stable and low loss state by providing a resistance element between the same kind of electrodes via a dielectric for every two unit transistors which are connected in parallel. CONSTITUTION:In place of conventional chip capacitors for an internal matching circuit on the input side, chip capacitors 19 and 20 which have resistance elements for separating elements are arranged and the input electrodes of unit transistors are connected with a metalized terminal on the input side by connecting lines 21-23. For example, the chip capacitor 19 with a resistance element for separating elements is constructed by connecting a resistance element 25 between electrostatic capacitors 24a and 24b. Since this resistance element 25 absorbs the deviation current generated by the nonuniformity of unit transistors, input power is uniformly distributed and mutual action between the unit transistors is reduced. Therefore, balance in high frequency operations is generally improved, breakdown resisting capability is improved and a high output device is obtained. In addition, as its internal matching circuit is an concentrated constant type, the device can be formed in a small vessel. |
