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:
Jan. 27, 2015
Filed:
Mar. 28, 2011
Takeji Fujibayashi, Tokyo, JP;
Takeji Fujibayashi, Tokyo, JP;
Asahi Kasei Microdevices Corporation, Tokyo, JP;
Abstract
There is provided a circuit for adjusting phases of IQ local signals. As to a local signal A and a local signal B generated by a local signal generating unit for the purpose of generating IQ quadrature local signals, the local signal B in which the gain is adjusted is added to the output of the local signal A to obtain the local signal A, and the local signal A in which the gain is adjusted is subtracted from the output of the local signal B to obtain the local signal B. Even if the phase relationship between the local signal A and the local signal B deviates from 90 degrees, the phase difference between the local signal Aand the local signal Bcan be adjusted with ease by changing the adjustment amounts of variable amplifiers AMPand AMP