Biphase code generating apparatus

Details Biphase code generating apparatus Biphase code generating apparatus

H - Electricity

04

L

354/97

H04L 25/49 (2006.01) A61K 31/415 (2006.01) C07D 233/84 (2006.01) H03M 5/12 (2006.01)

Patent

CA 1241755

ABSTRACT Disclosed is an apparatus for generating a biphase code comprising: a generator circuit responsive to input data for generating first through fourth digital waveform data for first through fourth states, the first and second digital waveform data including data for +sin .theta. and -sin .theta., respective- ly, the third and fourth digital waveform data including data for +f(.theta.) and -f(.theta.), respectively, f(.theta.) = a + b( ? - 1)2 + c(? - 1)4 wherein 0 ? .theta. ? 2.pi. and a, b and c are coefficients. The generator circuit also generates first through fourth state indication signals identifying the first through fourth digital waveform signals, respectively. A selector is responsive to a control signal for selecting one of the first through fourth ital waveform data. A controller is responsive to the input data and any of the first through fourth state indication signals immediately before the state indication signal for providing the control signal for the selector converter converts any of the first through fourth digital waveform data selected to an analog waveform signal.

491715

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