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:
Aug. 06, 2013
Filed:
Mar. 12, 2012
Toru Matsuura, Kanagawa, JP;
Toru Matsuura, Kanagawa, JP;
Panasonic Corporation, Osaka, JP;
Abstract
Phase errors are reduced in an RFDAC. The RFDAC includes: a multi-phase radio-frequency signal generator that generates multiple radio-frequency signal pairs each having a phase difference of π; a vector selector that combines each of the multiple radio-frequency signals which has passed through at least one path; a test signal generator that generates a test signal; a multiplexer that selects either the test signal or the baseband signal; a vector controller that controls the vector selector so as to select a path for each of the multiple radio-frequency signal pairs; a detector that detects output signals outputted from the vector selector; a calibrator that, based on the output signals, calculates a calibration coefficient of a phase error between the radio-frequency signals of each of the multiple radio-frequency signal pairs, and calibrates the multiple radio-frequency signals or the baseband signal.