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. 12, 2010
Filed:
Jan. 24, 2007
Toshiya Uozumi, Tokyo, JP;
Jiro Shimbo, Tokyo, JP;
Toshiya Uozumi, Tokyo, JP;
Jiro Shimbo, Tokyo, JP;
Renesas Technology Corp., Tokyo, JP;
Abstract
A level converter level-converts an oscillation output signal of a reference frequency oscillator and supplies the level-converted signal to a phase comparator of a PLL/fractional synthesizer for controlling an oscillation frequency of an RF transmission voltage-controlled oscillator. The level converter includes a self-bias type voltage amplifier which amplifies a reference frequency signal of the reference frequency oscillator. The self-bias type voltage amplifier includes a coupling capacitor, an amplifying transistor, a load and a bias element and suppresses a variation in the level of each harmonic component even though an external power supply voltage varies.