Optical isolation circuit for bidirectional communication lines

Details Optical isolation circuit for bidirectional communication lines Optical isolation circuit for bidirectional communication lines

1979-04-04

1981-08-04

Orsino, Jr., Joseph A.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

250551, 307311, H04B 900

Patent

active

042826047

ABSTRACT:
In an improved optical isolator circuit for interfacing a modem or other data transceiver and the telephone lines, first and second optical paths are established by pairs of semiconductor, optical couplers connected between the modem and telephone lines. While the first optical path carries outgoing data from the modem to the lines, negative feedback on the second optical path provides bias stabilization of the optical couplers and associated circuitry. Similarly, while the second optical path carries data incoming from the lines, there is stabilizing, negative feedback on the first optical path. A high open loop gain, closed loop circuit strategy incorporated in the isolator provides wide band, linear operating characteristics without matched optical couplers.

REFERENCES:
patent: 3402297 (1968-09-01), Harris
patent: 3410961 (1968-11-01), Slana
patent: 3902060 (1975-08-01), Neuner et al.
patent: 3912951 (1975-10-01), Kihara
patent: 3970784 (1976-07-01), Meijerink
patent: 3987257 (1976-10-01), Place
patent: 4056719 (1977-11-01), Waaben
Longacre--Opto-Isolators Couple CRT Terminals to Printers Lines--Electronics, Oct. 2, 1975, p. 118.
Nielsen--Matched Optical Couplers Stabilize Isolation Circuit--Electronics, vol. 48, #10, May 15, 1975, pp. 98-99.
Morrison et al.--A Linear Opto-Isolator-Conf. on Hybrid Microelectronics Loughborough Leics Eng.--Sep. 9-11, 1975, pp. 117-126.

Affiliated with

Also associated with

Rating

Optical isolation circuit for bidirectional communication lines does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical isolation circuit for bidirectional communication lines, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical isolation circuit for bidirectional communication lines will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-243696