Digital demodulation

Details Digital demodulation Digital demodulation

2006-08-08

2006-08-08

Tran, Khai (Department: 2611)

Industrial electric heating furnaces

Electron beam furnace device

Zone melting

C375S376000, C375S130000

Reexamination Certificate

active

07088763

ABSTRACT:
A digital demodulator includes a mixing section, 1stand 2nddigital comb filters, phase locked loop module, and a data recovery module. The mixing section is operably coupled to produce a digital I signal and a digital Q signal from a digital intermediate frequency signal. The 1stcomb filter filters the digital I signal while the 2ndcomb filter filters the digital Q signal. The phase locked loop module produces a digital signal from the filtered I and filtered Q signals. The data recovery module interprets the digital signal to recapture a data stream.

REFERENCES:
patent: 6057877 (2000-05-01), Limberg
patent: 6115432 (2000-09-01), Mishima et al.
patent: 6229560 (2001-05-01), Jun
patent: 6747987 (2004-06-01), Meador et al.
patent: 6907089 (2005-06-01), Jensen et al.

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