Phase selectable circuit for use in a stereo demodulator

Details Phase selectable circuit for use in a stereo demodulator Phase selectable circuit for use in a stereo demodulator

H - Electricity

04

B

333/4, 350/97

H04B 1/16 (2006.01) H04N 5/60 (2006.01) H04H 5/00 (2006.01)

Patent

CA 1267722

RCA 80,988 ABSTRACT A circuit has two signal paths. The first path provides a signal with a selected magnitude and phase. The second path selectively provides either no signal or a signal with twice the magnitude and opposite phase with respect to that provided by said first path. The signals of the two paths are combined to provide a signal with a selectable phase. The circuit can be used in a stereo decoder in which an L+R stereo sum signal is combined with an expanded R-L stereo difference signal, provided by an expander also used for a SAP signal, to produce left (L) and right (R) stereo signals so that when the SAP signal is being reproduced, it is of the same phase in both left and right channels.

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