Radiant energy – Photocells; circuits and apparatus – Signal isolator
Patent
1992-11-16
1994-02-01
Messinger, Michael
Radiant energy
Photocells; circuits and apparatus
Signal isolator
307311, 604 20, 250214A, G02B 2700, H03K 342, A61N 130
Patent
active
052834417
ABSTRACT:
An optically isolated current mirror provides an isolated output signal as a function of an input signal. The mirror includes first and second optical isolators and an amplifier. The amplifier is connected to the first and second optical isolators in a voltage follower configuration which supplies the output signal as a function of an isolated control signal and an isolated feedback signal. The first optical isolator is connected between a source of the input signal and the amplifier. The first optical isolator includes a photosensitive np junction which generates the isolated control signal as a function of the input signal. The second optical isolator is connected to the amplifier in a feedback loop. The second optical isolator includes a photosensitive np junction which generates the isolated feedback signal as a function of the output signal.
REFERENCES:
patent: 4417099 (1983-11-01), Pierce
patent: 4539480 (1985-09-01), Artinano et al.
patent: 4596048 (1986-06-01), Dunki-Jacobs
patent: 4629901 (1986-12-01), Nishizawa
patent: 4649302 (1987-03-01), Damiano et al.
patent: 4652764 (1987-04-01), Nagano
patent: 4712020 (1987-12-01), Basile
patent: 4739174 (1988-04-01), Nagano
patent: 4825351 (1989-04-01), Uesugi
patent: 4902901 (1990-02-01), Pernyeszi
patent: 5043587 (1991-08-01), Miki et al.
patent: 5089948 (1992-02-01), Brown et al.
Williams, "Design Considerations for Optically Coupled Isolators", Electronic Engineering, vol. 48, No. 586, pp. 59-62, Dec. 1976.
Cirovic et al., Electronic Devices, Circuits, and Systems, 1987, p. 133.
Hamamatsu, product catalog, 1990, "Photocouplers", pp. 1-17.
Dionics, Inc. Data Book, ISO-GATE Device Applications (Mar. 1989) (Isolation Amplifier shown in lower right hand corner of page).
Siemens Data Book, IL300 Linear Optocouplers (April 1991).
EMPI Inc.
Messinger Michael
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