H - Electricity – 03 – K
Patent
H - Electricity
03
K
328/78
H03K 5/01 (2006.01) H03K 5/12 (2006.01) H04N 7/035 (2006.01)
Patent
CA 1169928
PHB. 32,840. 15 ABSTRACT: A circuit arrangement for improving the shape of a data pulse waveform prior to data slicing by correc- ting for s reduction of the high frequency content of the waveform using an adaptive crispening technique. The arrangement comprises a high pass filter connected to an input art which the waveform is applied. The filter separates the high frequency content which is multiplied by an amplitude correcting signal in a multiplier. The signal data pulse waveform and the multiplier output are added in an adder to produce a resultant output waveform, which is fed to data slicer. The resultant output wave- form is also applied to a peak-to-peak detector via a switch when the latter is closed periodically by a timing circuit. The detector produces a control signal propor- tional to the amplitude of the resultant output waveform which it receives via the switch. A subtractor produces the amplitude correcting signal as the difference between the control signal and a reference signal (RF).
416811
Koninklijke Philips Electronics N.v.
Van Steinburg C.e.
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