Fiber-to-the-home (ftth) optical receiver with distributed...

Details Fiber-to-the-home (ftth) optical receiver with distributed... Fiber-to-the-home (ftth) optical receiver with distributed...

H - Electricity

04

B

H04B 10/158 (2006.01) H03G 3/30 (2006.01)

Patent

CA 2642426

A fiber-to-the-home (FTTH) system transmits forward and reverse optical signals, such as video, voice, and data signals, via optical fiber, and includes a plurality of home network units. The home network units include an optical receiver for receiving at least one of the video, voice, and data signals. Included is a plurality of gain stages that are distributed throughout the optical receiver. The gain stages include a preamplifier stage, two interstage amplifiers, and a postamplifier stage. Two gain control circuits automatically adjust the gain of the video signal based upon the input power level to the FTTH optical receiver. Additionally, a tilt network performs level compensation for externally located coaxial cable. A signal is then provided to a device located within a home via the coaxial cable at the proper RF level having low noise signals.

Le système fiber-to-the-home (FTTH) selon l'invention transmet par une fibre optique des signaux optiques directs et inverses, tels des signaux vidéo, vocaux et de données et comprend de multiples unités de réseau domestique. Les unités de réseau domestique incluent un récepteur optique pour recevoir au moins l'un des signaux, vidéo, vocaux ou de données. Sont inclus de multiples étages de gain distribués dans le récepteur optique. Les étages de gain comprennent un étage préamplificateur, deux amplificateurs inter-étage, et un étage postamplificateur. Deux circuits de commande de gain règlent automatiquement le gain du signal vidéo en fonction du niveau de puissance d'entrée au récepteur optique FTTH. En outre, un réseau tilt réalise une compensation de niveau pour câble coaxial extérieur. Un signal est alors fourni par le câble coaxial à un dispositif situé dans un logement, au niveau RF approprié et avec des signaux faible bruit.

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