Equalizing filter and control method for signal equalization
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United States of America Patent
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Oct 5, 1999
Grant Date -
N/A
app pub date -
Mar 3, 1998
filing date -
Oct 16, 1997
priority date (Note) -
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Abstract
An equalizing filter with an optimized frequency response and improved reliability and quality, for equalizing a reception signal so as to regain its original waveform. The equalizing filter comprises a low-pass filter and a high-frequency booster circuit. With its limited passband, the low-pass filter rejects the noise components contained in the signal being processed. The high-frequency booster circuit has such a frequency response that exhibits a stepwise gain increase at high frequencies. Those two elements, composed of reliable passive components, are coupled in series to provide a combined frequency response that is optimized for the design of highly sensitive optical receivers. As integral part of the high-frequency booster circuit, the equalizing filter employs an inductor made of a bonding wire. To obtain a predetermined inductance with high accuracy, the bonding wire is divided into a plurality of sections, which are used to make a daisy chain connection that bridges between a plurality of lands disposed on the substrate.
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