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Communication system and method

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • H04M-011/04
출원번호 US-0301156 (1994-09-02)
발명자 / 주소
  • Seberger Stephen G. (Marshalltown IA) Grumstrup Bruce F. (Marshalltown IA) Gassman George W. (Marshalltown IA)
출원인 / 주소
  • Fisher Controls International, Inc. (Clayton MO 02)
인용정보 피인용 횟수 : 113  인용 특허 : 0

초록

The present invention relates to a circuit which is connected by two-conductors to a control system for a variable analog DC input and that also enables bidirectional digital communication along the two conductors for diagnostic operations of an instrument. The novel circuit includes a switch circui

대표청구항

A system for communicating between a control system and a remote instrument, the system comprising: a single pair of first and second conductors coupled between the control system and the remote instrument for carrying variable analog DC control signals to the remote instrument to cause the remote i

이 특허를 인용한 특허 (113)

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