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US 6,011,770 AGranted
Method and apparatus for high-order bandpass filter with linearly adjustable bandwidth
AssigneeTexas Instrumental Incorporated
InventorMehmet Ali Tan
Life of this patent
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Abstract
A method and apparatus for linearly adjusting the bandwidth of a high-order bandpass filter. A high-order bandpass filter is formed by cascading together two or more low-order bandpass filters. The bandwidths and center frequencies of each individual low-order bandpass filter is adjusted. The center frequency of some low-order bandpass filters are adjusted so as to achieve linear adjustment of the bandwidth of the high-order bandpass filter.
Claims12
A writeable optical disk wobble signal capture system comprising:
- a storage device;
- a first controller operably connected to said storage device;
- a second controller operably connected to said storage device;
- a high-order bandpass filter with linearly adjustable bandwidth, said bandpass filter formed of cascaded low-order bandpass filters, and wherein said high-order bandpass filter is used to capture said writeable optical disk wobble signal;
- one or more digital-to-analog converters, each said one or more digital-to-analog converters operably connected to said high-order bandpass filter, and operably connected to one of said first controller and said second controller;
- read head device operably connected to said high-order bandpass filter;
- and
- write head device operably connected to said high-order bandpass filter, said write head device using said writeable optical disk wobble signal for location information.
5 more elements
Dependencies are inferred from the claim text.