公开(公告)号：JPS5814610B2

公开(公告)日：1983-03-19

申请号：JP4110475

申请日：1975-04-04

Applicant: ROSEMOUNT INC

Inventor： ROJAA REONAADO FURITSUKU ,  ROBAATO RUUISU JERONIMU

IPC: G01L1/14 ,  G01L9/00 ,  G01L9/12

公开(公告)号：JPS6019039B2

公开(公告)日：1985-05-14

申请号：JP539576

申请日：1976-01-20

Applicant: ROSEMOUNT INC

Inventor： ROJAA REONAADO FURITSUKU

IPC: G08C19/02 ,  G01L9/12 ,  G01R27/26 ,  G08C19/10

Abstract: A two wire current transmitter providing a current signal representing a parameter measured by a variable reactance transducer along the same two wires that are used to carry excitation power to the circuit. The reactance is measured by a circuit providing a DC signal which controls a current control stage to modify the total current through the two wires. The current control stage has a small number of components and operates on a relatively low voltage.