AM-FM combined stereo receiver

Details AM-FM combined stereo receiver AM-FM combined stereo receiver

1991-02-06

1992-04-28

Kuntz, Curtis

Telecommunications

Receiver or analog modulated signal frequency converter

Convertible to different type

381 7, 455214, H04H 500

Patent

active

051095424

ABSTRACT:
An improved AM-FM combined stereo receiver is provided having a single processor for removing, in the FM mode, arctangent distortion, and in the AM mode, to process the phase term from arctangent ##EQU1## to determine ##EQU2## Further, the radio includes a single discriminator circuit, wherein, in the FM mode, the discriminator tank circuit is used to convert frequency deviation to baseband audio, and in the AM mode, the discriminator tank circuit is used as the frequency-determining element for the voltage controlled oscillator (VCO), the VCO being used to translate the intermediate frequency (IF) signal to baseband.

REFERENCES:
patent: 3472967 (1969-10-01), Wofford et al.
patent: 3665507 (1972-05-01), Peil
patent: 4435618 (1984-03-01), Fujishima
patent: 4821322 (1989-04-01), Bose
patent: 5014316 (1991-05-01), Mariah et al.

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