Method and apparatus for high frequency digital carrier...

Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synthesizer

Reexamination Certificate

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Details

C327S107000, C327S355000, C341S147000

Reexamination Certificate

active

06867625

ABSTRACT:
A signal synthesizer according to the present invention produces a high speed or high frequency carrier waveform without employing an ASIC or FPGA operating at a sampling rate of greater than twice the carrier frequency. The signal synthesizer basically simulates a high speed or high frequency direct digital synthesizer with a plurality of low speed or low frequency direct digital synthesizers. The low speed synthesizers are operated in parallel and each one produces an intermediate carrier waveform with a frequency less than the desired carrier frequency. The intermediate carrier waveforms are subsequently multiplexed together to form a high frequency digital carrier waveform that is subsequently converted to an analog signal with a high-speed digital-to-analog converter. In addition, the signal synthesizer may perform phase, frequency and/or amplitude modulation.

REFERENCES:
patent: 5430764 (1995-07-01), Chren, Jr.
patent: 5467294 (1995-11-01), Hu et al.
patent: 5563535 (1996-10-01), Corry et al.
patent: 5596290 (1997-01-01), Watkins et al.
patent: 5673212 (1997-09-01), Hansen
patent: 5737253 (1998-04-01), Madisetti et al.
patent: 5789950 (1998-08-01), Nakagawa
patent: 5999581 (1999-12-01), Bellaouar et al.
patent: 6078629 (2000-06-01), Critchlow et al.
patent: 6236275 (2001-05-01), Dent
patent: 6307441 (2001-10-01), Sharpe
patent: 6337778 (2002-01-01), Gagne
patent: 6347325 (2002-02-01), Ribner et al.
patent: 6404371 (2002-06-01), Takahashi et al.
patent: 6449317 (2002-09-01), Critchlow et al.
patent: 6466064 (2002-10-01), Kurogouchi et al.
patent: 6522176 (2003-02-01), Davis
patent: 6539411 (2003-03-01), Johnson
patent: 6628638 (2003-09-01), Sato et al.

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