Digital inphase/quadrature product detector

Details Digital inphase/quadrature product detector Digital inphase/quadrature product detector

1987-08-17

1988-10-18

Grimm, Siegfried H.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

329122, 329126, 375 94, H03D 100, H03D 300

Patent

active

047790547

ABSTRACT:
The detector is responsive to a modulated intermediate frequency (IF) or radio frequency (RF) signal for producing four sample signals spaced at 90.degree. one-quarter IF (or RF) cycle apart, the first and third sample signals corresponding to the amplitude of the IF signal and its negative value, respectively, the stream of such sample signals corresponding to the inphase component of the IF signal; the fourth and second sample signals corresponding to the amplitude of the IF signal and its negative value, respectively, the stream of such sample signals corresponding to the quadrature component of the IF signal.

REFERENCES:
patent: 3617719 (1971-11-01), Wong et al.
patent: 3950750 (1976-04-01), Churchill et al.
patent: 4003054 (1977-01-01), Goldstone
patent: 4011438 (1977-03-01), Aufderheide et al.
patent: 4190802 (1980-02-01), Levine
patent: 4594555 (1986-06-01), Hilton
patent: 4634989 (1987-01-01), Mehrgardt

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