Wave transmission lines and networks – Coupling networks – Equalizers
Patent
1998-03-03
1999-10-05
Gensler, Paul
Wave transmission lines and networks
Coupling networks
Equalizers
333 81R, 333167, H03H 703
Patent
active
059631104
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.
REFERENCES:
patent: 2717956 (1955-09-01), Eglin
patent: 4490692 (1984-12-01), Schorr
patent: 4967169 (1990-10-01), Sun et al.
Hamano Hiroshi
Ihara Takeshi
Fujitsu Limited
Gensler Paul
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