Siemens Components, Inc.

Siemens Microelectronics Limited

Robert Krause

By using a monolithic sheet of photodetector semiconductor and creating a series of isolated individual optical paths, the performance of a multiple channel coupler can be improved. Multiple photodetectors are fabricated on the substrate, yielding electro-optically matched devices. By using common connection of the photodetectors and common connection of the optical sources, the pin-per-channel count is minimized.

Monolithic, multiple-channel optical coupler

Isolation and interconnection of a telephone network of tip and ring lines and the analog ports of a modem are achieved with a transhybrid that incorporates optically-coupled isolation stages. Optical isolators directly connect to the tip and ring lines to provide optimal isolation and unidirectional transfer of signals.

Optically-coupled data access arrangement and transhybrid

Optical feedback control in an optical emitter-detector combination can be improved by fabricating the two devices on a single substrate. The feedback radiation can then travel within a monolithic structure. This arrangement will yield greater uniformity in devices as well as provide for easier mechanical assembly.

Monolithic optical emitter-detector

Isolation and interconnection of a telephone network of tip and ring lines and the analog ports of a modem are achieved with a transhybrid that incorporates optically-coupled isolation stages. Optical isolators connect to the tip and ring lines to provide optimal isolation and unidirectional transfer of signals.

Bidirectional isolated interfaces using optical couplers offer a compact and cost-effective alternative to traditional line transformers. The devices can be configured to provide half-duplex or full-duplex communication.

Linear bidirectional optocoupler

An optically-coupled line receiver that handles multiple-state signals on data communications lines by using a differential circuit at the input.

Optically-coupled differential line receiver

Monolithic optical emitter-detector having a control amplifier with a

By using the linear behavior of optical emitters, one can provide an optically-coupled data communications line driver that directly interfaces with differential circuits. A single emitter provides multi-level signals avoiding the need for separate discrete devices.

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Menlo Park, CA, United States of America

Robert Krause