发明名称 |
MULTIPLE CHANNEL UPCONVERTER HAVING ADJACENT CHANNEL OUTPUT AND METHOD OF IMPLEMENTING THE SAME |
摘要 |
An upconverter unit for a cable television system upconverts multiple channel signals from a common intermediate frequency to a VHF or UHF signal ready for transmission to subscribers. The two-stage upconverter provides a first stage in which different channel signals are upconverted to different frequencies which are spaced apart by same frequency difference characteristic of different channels in the cable system. A second stage of the upconverter uses a common oscillator signal to convert the various channel signals from the first stage to the frequencies at which they will be transmitted over the cable system.
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申请公布号 |
WO0147261(A1) |
申请公布日期 |
2001.06.28 |
申请号 |
WO2000US34369 |
申请日期 |
2000.12.19 |
申请人 |
GENERAL INSTRUMENT CORPORATION |
发明人 |
GROFF, DONALD |
分类号 |
H03D7/16;H04N7/10;(IPC1-7):H04N7/10 |
主分类号 |
H03D7/16 |
代理机构 |
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代理人 |
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地址 |
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