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:
Oct. 20, 2020
Filed:
Oct. 26, 2018
Seiko Epson Corporation, Tokyo, JP;
Naoki Ishihara, Machida, JP;
Koji Chindo, Chino, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A frequency signal generation apparatus includes an atom cell including a first part including gaseous alkali metal atoms and a second part including liquid alkali metal atoms. A first temperature controller controls the first part's temperature. A second temperature controller controls the second part's temperature to be lower than that of the first part. First and second temperature detectors respectively detect the first and second parts' temperatures. The first temperature controller and the second temperature detector are thermally connected. The second temperature controller and the first temperature detector are thermally connected. The phase of a temperature control loop of the first part including the first temperature controller and the first temperature detector and the phase of a temperature control loop of the second part including the second temperature controller and the second temperature detector are different.