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Adjustable Bandwidth Hybrid Receiver

IP.com Disclosure Number: IPCOM000114372D
Original Publication Date: 1994-Dec-01
Included in the Prior Art Database: 2005-Mar-28
Document File: 2 page(s) / 20K

Publishing Venue

IBM

Related People

Hogan, WK: AUTHOR

Abstract

For fiber optic receivers, it is known that higher sensitivities and improved performance, in the presence of unwanted optical power oscillations, can be realized when the receiver bandwidth is optimized and set to a predetermined value relative to the data rate and spectral content within the bit stream.

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Adjustable Bandwidth Hybrid Receiver

      For fiber optic receivers, it is known that higher
sensitivities and improved performance, in the presence of unwanted
optical power oscillations, can be realized when the receiver
bandwidth is optimized and set to a predetermined value relative to
the data rate and spectral content within the bit stream.

      An optical receiver, consisting of a photodetector and a
transimpedance preamplifier, is disclosed which has an adjustable
bandwidth.  The bandwidth is adjusted and set to a predetermined
value by adjusting the bias voltage applied to the photodetector.  A
photodetector's speed, bandwidth, and capacitance is dependent on the
level of reverse bias applied, providing the adjustment mechanism.