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公开(公告)号：JP2001028608A
公开(公告)日：2001-01-30
申请号：JP2000160376
申请日：2000-05-30
Applicant: ST MICROELECTRONICS SRL
Inventor： DELLA TORRE LUIGI , RONCHI MARCO , VITALI ANDREA
Abstract: PROBLEM TO BE SOLVED: To restore the frequency and phase of a carrier by generating a first carrier which is not correlated to an input signal, to be modulated, to multiply the first carrier by the input signal, which should be modulated, and removing radiation of undesirable spectrum by plural filters arranged at the up/down stream of a multiplier. SOLUTION: A signal reaching from a tuner 11 is sampled by an analog/ digital converter 12 and supplied to a block 10, next. The block 10 includes an input filter 1, a low-pass filter 2 and a multiplier 3 for removing radiation of undesirable spectrum. In the block 10, the multiplier 3 multiplies a signal outputted from the filter 1 by a carrier given by a carrier generator 13. A digital demodulator includes a means for detecting phase shift between the frequency of an input signal (x), which is given from the converter 12 and supplied to the filter 1, and a local carrier in addition.
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公开(公告)号：DE60309430D1
公开(公告)日：2006-12-14
申请号：DE60309430
申请日：2003-01-31
Applicant: ST MICROELECTRONICS SRL
Inventor： BARONE MASSIMILIANO , VITALI ANDREA , PAU DANILO PIETRO , SIRTORI DANIELE , LAVIGNA DANIELE , GARDELLA PIERLUIGI
IPC: G06T9/00
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公开(公告)号：DE69932416D1
公开(公告)日：2006-08-31
申请号：DE69932416
申请日：1999-05-31
Applicant: ST MICROELECTRONICS SRL
Inventor： DELLA TORRE LUIGI , RONCHI MARCO , VITALI ANDREA
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