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:
Jun. 30, 1987
Filed:
Jan. 31, 1986
Akira Takayama, Soma, JP;
Alps Electric Co., Ltd., , JP;
Abstract
A band pass filter and frequency converter in a frequency conversion circuit are arranged such that a strip line constituting a part of the frequency converter and having a 1/4 wavelength relative to that of a local oscillation signal, is disposed adjacently in parallel to one of the opposite sides of a U-shaped line of the band pass filter to thereby form inductive coupling through which the frequency converter and the band pass filter are connected to each other at a high impedance open end of the above-mentioned strip line, so that the inductive coupling is made to be sufficiently strong. Accordingly, it is possible to produce a sufficiently large intermediate-frequency signal.