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:
Feb. 05, 2002
Filed:
Nov. 03, 2000
Nobuyasu Kanekawa, Hitachi, JP;
Yasuyuki Kojima, Hitachi, JP;
Seigou Yukutake, Hitachinaka, JP;
Minehiro Nemoto, Hitachi, JP;
Kazuhisa Takami, Hitachi, JP;
Takayuki Iwasaki, Hitachi, JP;
Yusuke Takeuchi, Hachioji, JP;
Yasuo Shima, Ohme, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In order to reduce the consumption of power of an isolator interface and an ADC, it is proposed to operate a calling signal reception or Caller ID signal reception function only with power supplied from the system switch while maintaining the on-hook condition of a telephone. At the time of normal operation, the output of the analogue digital converter is input to an isolator through the isolator interface, and at the time of the calling signal reception or the caller identification information reception, the output of the analogue digital converter is input directly to the isolator.