The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 23, 1999
Filed:
Feb. 20, 1998
Shin Chaki, Tokyo, JP;
Yasuharu Nakajima, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention provides a high frequency amplifier circuit and a microwave integrated circuit which allow easy development of various models having different operating frequencies and other properties and improve the yield of production. The high frequency amplifier circuit of the present invention comprises a high frequency transistor and a matching circuit connected between a terminal of the transistor and an external connection terminal, wherein the matching circuit has a variable capacitive element of which one end is connected to a terminal of the transistor and the other end is connected to the external connection terminal, and a short stub of which one end is connected to the other end of the variable capacitive element and the other end is directly grounded.