Receiving apparatus for stereophonic broadcast having amplitude

Details Receiving apparatus for stereophonic broadcast having amplitude Receiving apparatus for stereophonic broadcast having amplitude

1981-07-27

1984-02-07

Pellinen, A. D.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Broadcast or multiplex stereo

329135, H04H 500

Patent

active

044307470

ABSTRACT:
A receiver for demodulating a stereophonic broadcast signal. Envelope detection is provided for a preselected radio frequency broadcast signal. Angle demodulation of a difference signal contained in the broadcast signal is provided at the radio frequency level avoiding the use of superheterodyne techniques. Improved linearity is achieved over detection techniques which operate at an intermediate frequency level. Receiver protection from excessive negative modulation peaks is provided as well as subsequent audio signal processing.

REFERENCES:
patent: 3999132 (1976-12-01), Smith
patent: 4232189 (1980-11-01), Leitch
patent: 4324952 (1982-04-01), Smiley
patent: 4340782 (1982-07-01), Weigand et al.

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