Self adjusting data detector

Details Self adjusting data detector Self adjusting data detector

1989-02-23

1990-06-26

Olms, Douglas W.

Pulse or digital communications

Repeaters

Testing

455240, 455245, H04L 2708

Patent

active

049378422

ABSTRACT:
A self adjusting data detector receives a modulated carrier waveform and removes the carrier signal, leaving a bandwidth limited waveform. The bandwidth limited waveform represents a digital signal which has lost its squared edges due to the high frequency components which were suppressed during modulation, transmission, and demodulation. The self adjusting data slicer uses a first peak detector to feedback a detector bias voltage to set one peak of the bandwidth limited waveform to a predetermined level. A second peak detector is used to feedback a peak bias voltage to set the opposite peak of the bandwidth limited waveform to a second predetermined level. A data slicer is then able to accurately slice the bandwidth limited waveform at a predetermined magnitude therein recovering the original timing of the digital signal. The data slicer is able to maintain its accuracy over changing modulation levels.

REFERENCES:
patent: 3409834 (1968-11-01), Cullis et al.
patent: 3733553 (1973-05-01), Magnante et al.
patent: 4099124 (1978-07-01), Sharpe et al.
patent: 4250458 (1981-02-01), Richmond et al.
patent: 4339727 (1982-07-01), Kage et al.
patent: 4479253 (1984-10-01), Daniel, Jr.
patent: 4757502 (1988-07-01), Meurich et al.

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