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. 28, 2013
Filed:
Jul. 30, 2010
Naoki Onishi, Chitose, JP;
Naoki Onishi, Chitose, JP;
Nihon Dempa Kogyo Co., Ltd., Tokyo, JP;
Abstract
A frequency synthesizer in which a satisfactory frequency stability can be obtained over the entire long period of service immediately after power activation is disclosed. The reference signal generation circuit includes an OCXO, a TCXO, weight converters which regulate weights with respect to outputs, and an adder which adds up the outputs from the weight converters to output the added output as a reference signal. The CPU controls weight converters B and C so that the weight of the TCXO is set to 100% and the weight of the OCXO is set to 0% at the time of the power activation, so that the weight of the OCXO gradually rises, and so that the weight of the TCXO is set to 0% and the weight of the OCXO is set to 100% after preset time, whereby the frequency can quickly be stabilized after the power activation.