Abstract: A variable decision threshold apparatus includes a comparator for receiving the electrical signal and for comparing it to a threshold level. A signal strength monitor monitors the strength of the electrical signal and a scaler scales the decision threshold level to the measured amplitude of the electrical signal so that the percentage set as the threshold level is maintained.

Abstract: A variable decision threshold apparatus includes a comparator for receiving the electrical signal and for comparing it to a threshold level. A signal strength monitor monitors the strength of the electrical signal and a scaler scales the decision threshold level to the measured amplitude of the electrical signal so that the percentage set as the threshold level is maintained.

Abstract: An optical device having a housing for one or more optoelectronic components, for example a semiconductor laser transmitter or a photodiode. The optoelectronic device, comprises an open-ended metal canister, an insulating substrate, at least one optoelectronic component mounted on the substrate, and one or more electrical connections made to the component(s). The insulating substrate closes the open end of the metal canister so that the metal canister and insulating substrate together form a housing for one or more of the components mounted on the substrate. The insulating substrate acts as a circuit board to carry the electrical connections from the component(s) externally of the housing. The canister has at least one optical port by which optical radiation may be transmitted into and/or out of the housing.

Abstract: The present invention relates to an optical device having a housing for one or more optoelectronic components, for example a semiconductor laser transmitter or a photodiode. The optoelectronic device (30), comprises an open-ended metal canister (36), an insulating substrate (34), at least one optoelectronic component (42) mounted on said substrate, and one or more electrical connections (39,44,49) made to said component(s) (42). The insulating substrate (34) closes the open end (37) of the metal canister (36) so that the metal canister and insulating substrate (34) together form a housing (32) for one or more of said components (42) mounted on the substrate (34). The insulating substrate (34) acts as a circuit board to carry said electrical connections from said component(s) externally of the housing (32). The canister (36) has at least one optical port (38) by which optical radiation (45) may be transmitted into and/or out of said housing (32).