Optical receiver using variable negative-capacitance circuit
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United States of America Patent
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Aug 31, 2004
Grant Date -
N/A
app pub date -
Sep 19, 2000
filing date -
Mar 19, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A large time constant is caused due to parasitic capacitance at an anode terminal of a photodetector of an optical receiver. Therefore, an optical receiver wherein a variable negative capacitor mainly including an NPN-type transistor operable at high speed is configured and is connected to the input terminal of a preamplifier to which the output of the photodetector is input so that parasitic capacitance caused in the photodetector and due to packaging is equivalently reduced and the fluctuation of parasitic capacitance caused due to manufacturing dispersion is also compensated is provided.
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