Signal detection system

Details Signal detection system Signal detection system

1979-06-15

1981-04-21

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307359, 307264, 328116, 328162, H03K 5153

Patent

active

042635551

ABSTRACT:
A signal detection system, of a type suitable for use in line scanning or character recognition apparatus, for providing substantially invariant output signal waveforms in response to repetitive input signals superimposed on pedestal levels. The input signals and pedestal signals may vary substantially. The signal detection system includes a forward signal path including apparatus for amplifying and slicing the input signals, a degenerative feedback path including apparatus for generating a balance signal which is proportional to the amplified difference between an average of the output signals and a reference level, and, the detection system also includes apparatus for subtractively applying the balance signal to substantially eliminate the effects of the pedestal signals on the output waveform.

REFERENCES:
patent: 3737790 (1973-06-01), Brown
patent: 3758868 (1973-09-01), Brown
patent: 3999083 (1976-12-01), Bumgardner
patent: 4114034 (1978-09-01), Hunka
patent: 4128760 (1978-12-01), Del Signore
patent: 4156854 (1979-05-01), Weller
patent: 4158859 (1979-06-01), Kerbel
G. W. Hunka, "Aided-Track Cursor for Improved Digitizing Accuracy", Photogrammetric Engineering and Remote Sensing, vol. 44, No. 8, Aug., 1978, pp. 1061-1066.

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