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:
Jul. 12, 2011
Filed:
Jan. 16, 2007
Yosuke Mitani, Tokyo, JP;
Shunsuke Hirano, Kanagawa, JP;
Kaoru Ishida, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
Provided are a PLL modulation circuit, a radio transmission device, and a radio communication device capable of maintaining a modulation accuracy for modulation of a wide band. The PLL modulation circuit () includes: a PLL unit (), first modulation signal input means for inputting a first modulation signal to a divider () or a phase comparator () of the PLL unit (); second modulation signal input means for DA converting the digital modulation signal in a DA converter () to generate an analog second modulation signal and inputting it to a voltage control oscillator () of the PLL unit (); a second divider for dividing the output signal of the voltage control oscillator (); and control means for generating a center frequency control signal, a gain control signal, and a second division ration control signal according to the channel selection signal and the control voltage inputted to the voltage control oscillator () and supplying them to the divider (), the DA converter (), and the second divider (), respectively.