Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1992-10-23
1994-01-18
Powell, Mark R.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358904, 358176, 358184, 330304, 330294, 333 28R, H04N 5205
Patent
active
052803465
ABSTRACT:
Equalizing amplifying circuitry for compensating frequency dependent losses occurring in a signal transmitted over a network such as a cable. The circuitry includes an equalizing network responsive to the signal transmitted over the cable, the equalizing circuitry having a predetermined frequency response characteristic. The output signal from the equalizing network is applied to an amplifier and an attenuator applies a portion of the amplifier output as a positive feedback signal to frequency response characteristic modifying circuitry to vary the amount of current passing through the equalizing circuitry as a function of the amplitude of the positive feedback signal to thereby effectively modify the frequency response characteristic of the equalizing circuitry. Summing circuitry responsive to the signal transmitted over the network and to the output signal from the amplifier provides a corrected signal in which the frequency dependent losses introduced by the network are compensated for with a single control.
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