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. 24, 2015
Filed:
Jul. 24, 2012
Masahiko Onishi, Osaka, JP;
Isao Katsura, Osaka, JP;
Masahiko Onishi, Osaka, JP;
Isao Katsura, Osaka, JP;
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka-shi, Osaka, JP;
Abstract
A compensation apparatus compensates a quadrature-demodulated signal output from a quadrature demodulatorthat performs quadrature demodulation by using a signal of a carrier frequency fc, by removing an image component caused by the quadrature demodulatorfrom the quadrature-demodulated signal. The compensation apparatus includes a signal generatorthat generates a reference signal having a predetermined bandwidth in a reception band, and provides the reference signal to an input side of the quadrature demodulator. The reference signal includes a frequency band that is biased to either a higher-frequency side or a lower-frequency side with respect to the carrier frequency.