Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1991-04-03
1993-01-12
Callahan, Timothy P.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
328167, H03B 100, H03K 500
Patent
active
051793024
ABSTRACT:
An electronic data filter system (10), which functions as an approximation of a perfect matched filter, receives a conventional square-wave digital input signal (12) and outputs a filtered output signal (18). Output signal (18) appears as the summed integral of input signal (12). Filter system (10) includes a rate detector (50), which receives input signal (12) and provides a tuning voltage (16), and a data filter (30) which provides output signal (18). Data filter (30) includes, arranged in series, a notch filter (80) and a low-pass filter (90), wherein such filters (80, 90) contain capacitive-inductive circuits having certain value ratios which are tunable responsive to tuning voltage (16). Signal degradation of the filtered signal (12, 18) is minimized by filter system (10), which reduces the bit error rate (BER) and noise bandwidth of the filtered signal (12, 18). In one embodiment, data filters (30) are cascaded in parallel to extend data filtering bandwidth.
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Callahan Timothy P.
Fernandez Dennis S.
Loral Aerospace Corp.
Radlo Edward J.
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