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:
May. 18, 2021
Filed:
Mar. 10, 2017
Mitsubishi Electric Corporation, Tokyo, JP;
Akihito Hirai, Tokyo, JP;
Mitsuhiro Shimozawa, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
An IQ signal source () includes: a Q-VCO () having a first VCO () and a second VCO (), the IQ signal source () outputting an I signal and a Q signal by electrically coupling the first VCO () and the second VCO () with each other; a first PLL () for comparing a frequency of the I signal or the Q signal with a frequency of a reference signal input from the outside of the IQ signal source () and outputting a voltage depending on a result of the comparison; and a second PLL () for detecting an IQ phase difference and outputting a voltage depending on the IQ phase difference. The IQ phase difference converges to 90 degrees in dependence on the output voltage of the first PLL () and the output voltage of the second PLL ().