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. 15, 2019
Filed:
Mar. 17, 2016
Seiko Instruments Inc., Chiba-shi, Chiba, JP;
Kazumi Sakumoto, Chiba, JP;
SEIKO INSTRUMENTS INC., , JP;
Abstract
A frequency division circuit includes a first frequency division circuit which divides a frequency of a reference signal that is generated by an oscillation circuit. An input/output terminal outputs an output signal of the first frequency division circuit for testing. A selection circuit outputs as an intermediate signal one of a first intermediate signal which is input from the input/output output terminal, and a second intermediate signal which is an output signal of the first frequency division circuit. A second frequency division circuit divides a frequency of the intermediate signal output from the selection circuit. A switching time count circuit begins counting a predetermined amount of time after the second frequency division circuit starts frequency-dividing the intermediate signal and, after elapse of the predetermined amount of time, switches the intermediate signal output from the selection circuit from the first intermediate signal to the second intermediate signal.