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. 13, 2001
Filed:
Dec. 21, 1999
Hidemori Akagi, Ishikawa-ken, JP;
Masao Uno, Ishikawa-ken, JP;
Murata Manufacturing Co., Ltd., Nagaokakyo, JP;
Abstract
In the path from the output of a charging pump to a control voltage terminal including the inside of a loop filter, voltage application means for applying a direct-current voltage of a predictable value to the control voltage terminal is given, resulting in a PLL circuit. In the PLL circuit, first, a fixed direct-current voltage is applied to the control voltage terminal from the voltage application means. The oscillation frequency of a voltage-controlled oscillator may be adjusted by making use of a trimming area as a oscillation frequency adjustment mechanism. Therefore, the oscillation frequency of the voltage-controlled oscillator can be quickly adjusted using fewer pieces of equipment.