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:
Jul. 10, 2007
Filed:
Dec. 06, 2005
Toru Shirotori, Minami-Minowa, JP;
Toru Shirotori, Minami-Minowa, JP;
Seiko Epson Corporation, , JP;
Abstract
A given length of an input signal can be detected with small power consumption. A real time clock apparatus has an oscillating module which outputs an original oscillating clock signal having a predetermined frequency, a plurality of dividing modules which divides the original oscillating clock signal outputted from the oscillating module to generate clock signals having a period different from each other, a clock selecting circuit which outputs a clock signal having a given period outputted from the dividing module based on the supplied selection signal, and a signal detecting circuit which is connected to an external switch and which detects a length of an inputted signal by a clock signal outputted from the clock selecting circuit and senses whether the inputted signal is an input signal from the switch.