公开(公告)号：AU6787590A

公开(公告)日：1991-07-11

申请号：AU6787590

申请日：1990-12-07

Applicant: IBM

Inventor： HEILING GERALD MICHAEL ,  KNODEL DAVID ARDEL ,  PETERSON MICHAEL JOSEPH ,  SCHUELKE BRIAN ANDREW ,  SILJENBERG DAVID WARREN ,  SODERSTROM RONALD LEE ,  TRNKA JOHN THOMAS

IPC: G02B6/00 ,  A61B18/20 ,  B23K26/08 ,  H04B10/08

Abstract: A fully redundant safety interlock system is provided comprising, means for detecting the loss of light on a fiber optic link; controller means, coupled to said means for detecting, for determining the safety condition of the link based on the output of said means for detecting, and for controlling the radiant energy output of an optical transmitter, based on the determined safety condition, via redundant output control signals; and means, coupled to said controller means, responsive to said redundant control signals, for interconnecting the output of said controller means to transmitter drive circuitry to thereby adjust the radiant energy output by the transmitter. According to a preferred embodiment of the invention, the controller means includes an electronic implementation of two independent state machines, each of which redundantly determines the connection state of the optical link between two optical link cards. The output from the state machines is used to adjust (for example, turn on and turn off) the drive circuitry for the transmitter via fully redundant paths which carry the redundant control signals.

公开(公告)号：DE3881948T2

公开(公告)日：1994-01-20

申请号：DE3881948

申请日：1988-03-08

Applicant: IBM

Inventor： LOBB KENNETH GEORGE ,  SCHUELKE BRIAN ANDREW ,  SCHMERBECK TIMOTHY JOSEPH ,  SUTTON MANNING OLSEN

IPC: H03F1/30 ,  H03F3/34 ,  H03F3/343 ,  H03K19/0175

Abstract: A circuit (100) translates an input signal (EIN) about an input reference voltage (E1) to an output signal (EOUT) referenced to a different voltage (2). The input signal may be scaled, and multiple inputs may be scaled independently and summed. Shift networks transfer the input signal across a resistor (R1) on the input of a current mirror; the the output signal appears across a resistor (R3) in an output of the mirror.

公开(公告)号：DE3881948D1

公开(公告)日：1993-07-29

申请号：DE3881948

申请日：1988-03-08

Applicant: IBM

Inventor： LOBB KENNETH GEORGE ,  SCHUELKE BRIAN ANDREW ,  SCHMERBECK TIMOTHY JOSEPH ,  SUTTON MANNING OLSEN

IPC: H03F1/30 ,  H03F3/34 ,  H03F3/343 ,  H03K19/0175

Abstract: A circuit (100) translates an input signal (EIN) about an input reference voltage (E1) to an output signal (EOUT) referenced to a different voltage (2). The input signal may be scaled, and multiple inputs may be scaled independently and summed. Shift networks transfer the input signal across a resistor (R1) on the input of a current mirror; the the output signal appears across a resistor (R3) in an output of the mirror.