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:
Mar. 27, 1990
Filed:
Jun. 07, 1988
Akio Yamamoto, Yokohama, JP;
Toshio Nagashima, Yokohama, JP;
Hitachi, Ltd. (501), Tokyo, JP;
Abstract
Disclosed is a mixer circuit which employs four FET's in a manner so that a source electrode of a first FET and a source electrode of a second FET are connected to a first terminal, a source electrode of a third FET and a source electrode of a fourth FET are connected to a second terminal, a first impedance circuit is connected between the first terminal and the earth, a second impedance circuit is connected between the second terminal and the earth, a first high frequency input terminal is connected through a first switching circuit to a junction between the first impedance circuit and the first terminal, a second high frequency input terminal is connected through a second switching circuit to a junction between the second impedance circuit and the second terminal, a gate electrode of the first FET and a gate electrode of the fourth FET are connected to a third terminal, a gate electrode of the second FET and a gate electrode of the third FET are connected to a fourth terminal, a drain electrode of the first FET and a drain electrode of the third FET are connected to a fifth terminal, a drain electrode of the second FET and a drain electrode of the fourth FET are connected to a sixth terminal, and an electric source supply circuit is connected to the fifth and sixth terminals. Phase-reversed local oscillation signals are fed to the third and fourth terminals.