• 검색어에 아래의 연산자를 사용하시면 더 정확한 검색결과를 얻을 수 있습니다.
  • 검색연산자
검색연산자 기능 검색시 예
() 우선순위가 가장 높은 연산자 예1) (나노 (기계 | machine))
공백 두 개의 검색어(식)을 모두 포함하고 있는 문서 검색 예1) (나노 기계)
예2) 나노 장영실
| 두 개의 검색어(식) 중 하나 이상 포함하고 있는 문서 검색 예1) (줄기세포 | 면역)
예2) 줄기세포 | 장영실
! NOT 이후에 있는 검색어가 포함된 문서는 제외 예1) (황금 !백금)
예2) !image
* 검색어의 *란에 0개 이상의 임의의 문자가 포함된 문서 검색 예) semi*
"" 따옴표 내의 구문과 완전히 일치하는 문서만 검색 예) "Transform and Quantization"

특허 상세정보

Portable electronic apparatus having a detection device for detecting a variation of the supply voltage

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) H04Q-007/32    G08B-021/00   
미국특허분류(USC) 455/573 ; 455/572 ; 455/117 ; 455/127 ; 455/343 ; 340/661 ; 340/660 ; 320/152 ; 320/162
출원번호 US-0993134 (1997-12-18)
우선권정보 FR0015665 (1996-12-19)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Dicran Halajian
인용정보 피인용 횟수 : 19  인용 특허 : 16

The invention relates to an electronic apparatus whose power is supplied by a battery (11) having a memory (32) which contains electrically erasable data (32a) and a supply voltage detection device (37) for detecting a variation of the supply voltage (Vbat). The invention notably has for its object to provide a detection device (37) which is capable of instantaneously detecting various voltage levels to cut off the power supply (Vbat) without the contents of the memory (32) being changed and capable of indicating the charging level of a battery (11) or a...


[ What is claimed is:] [1.]1. An electronic device a comprising:a power source which supplies a supply voltage to said electronic device;a memory which stores data corresponding to threshold values;a controller which is connected to a collector of a transistor to monitor said supply voltage, said controller controlling a variable resistor connected to base of said transistor to switch said transistor when said supply voltage reaches said threshold values;said controller changing said variable resistor to increase said threshold values when said power sou...

이 특허에 인용된 특허 (16)

  1. Young Steven J. (Milpitas CA). Battery cell having an internal circuit for controlling its operation. USP1997045622789.
  2. Kuge Toru (Hino JPX) Kinoshita Hiroshi (Matsudo JPX). Battery rundown protection system for an automobile having a radio telephone apparatus with an automatic answering funct. USP1990104962543.
  3. Finger Eugene P. (Brewster NY). Bidirectional battery state-of-charge monitor. USP1988044740754.
  4. Umetsu Koji,JPX. Charging apparatus. USP1999075923150.
  5. Hikuma Hideo (Chiba JPX) Akiyama Masaru (Chiba JPX). Cordless telephone apparatus which restores radio channels after power loss. USP1995065426690.
  6. Yamamoto Ikuhiro (Kasuga JPX) Shibata Kenichi (Fukuoka-ken JPX). Cordless telephone with battery measuring section. USP1997105677944.
  7. Hayes ; Jr. John Joseph. Emergency telephone with automatic low-battery signaling. USP1998035726636.
  8. Kan John T. C. (Chicago IL) Kan John F. (Chicago IL) Habermann Joseph P. (Hartland WI). Method and apparatus for charging a battery in high amp and automatic charging modes. USP1992125168205.
  9. Takahashi Satoshi,JPX ; Matai Masahiro,JPX. Method and apparatus for checking a power supply in a radio receiver. USP1998035724651.
  10. Terashima Kazuhiko,JPX ; Someya Takahisa,JPX. Portable telephone unit for preserving data that is renewed during conversation. USP1999045898930.
  11. McCartney Andrew (Libertyville IL) DeWitt Charles (Park Ridge IL) Elliott William (Hawthorn Woods IL). Power line waveform measurement system. USP1991065027285.
  12. Shafer Timothy M. (R.R. #2 Box 78 Yankton SD 57078). Programmable battery charge indicator. USP1996085550475.
  13. Finger Eugene P. (Brewster NY). Quiescent voltage sampling battery state of charge meter. USP1984074460870.
  14. Shimura Yukihiro (Tokyo JPX) Saegusa Noboru (Tokyo JPX) Takagawa Yuichiro (Tokyo JPX) Tozuka Shoichi (Kanagawa JPX) Hatakeyama Yasushi (Saitama JPX). Radio telephone. USP1990034910761.
  15. Oh Se-Chun (Seungnam KRX). System for monitoring energy performance of secondary battery, and method therefor. USP1997025600229.
  16. Stamegna Ivano. Vehicular audio system incorporating detachable cellular telephone. USP1998085797088.

이 특허를 인용한 특허 피인용횟수: 19

  1. Hunt, Allan. Battery life indication. USP2005096950683.
  2. Shaffer, Jonathan Everett; Seltzer, Jamie Robert. Behavior adaptive battery control system for mobile device case. USP2016119509358.
  3. Hosoi,Toshikatsu. Cellular phone, and data protection method and program thereof. USP2006077082288.
  4. Walmsley, Simon Robert; Plunkett, Richard Thomas. Controller for printhead having arbitrarily joined nozzle rows. USP2011108038239.
  5. Lee,Dong Jin; Hwang,Byung Hun; Park,Chul Gyoo; Joo,Young Seoung. Device and method for controlling radio mobile terminal connected to hands-free kit. USP2008107444172.
  6. Priel, Michael; Kuzmin, Dan; Voorwinden, Cor. Device having failure recovery capabilities and a method for failure recovery. USP2012088248743.
  7. Wong, Yoon Kean. Information preservation on a portable electronic device. USP2013048433941.
  8. Wong,Yoon Kean. Information preservation on a portable electronic device. USP2008127472303.
  9. Wong,Yoon Kean. Information preservation on a portable electronic device. USP2007057225353.
  10. Shipton,Gary. Integrated circuit which disables writing circuitry to memory when the power drops below a power threshold predetermined and controlled by the processor. USP2007107278034.
  11. Kelley, Ronald J.; Muthuswamy, Sivakumar; Pratt, Steven D.; Pennisi, Robert W.. Means for measuring the liquid level in a reservoir for a fuel cell. USP2005036869708.
  12. Steinle,Claus; Aue,Axel. Method for monitoring the operating readiness of at least one memory element assigned to an electronic unit. USP2008097421603.
  13. Hintz, Frederick W.; Postma, Stephen J.. Method for setting electrical characteristics of sensors after assembly. USP2003096622372.
  14. Mercke, Johan; Ptasinski, Kristoffer; Håkansson, Niclas; Edholm, Bengt. Monitoring circuit. USP2004106810338.
  15. Shipton, Gary. Print engine having authentication device for disabling memory writing upon power drop. USP2010097805626.
  16. Crooks, John F.. RFID tag reader. USP2012068199004.
  17. Alan L. Susal. Radiated electric field monitor. USP200206D458157.
  18. Bell, Marshall; Morein, Stephen; Knausz, Imre. Ramp digital to analog converter. USP2017059653038.
  19. Yamashita, Tomitaka. Signal inspection device. USP2005046885962.