Method and apparatus for supplying a system for processing electrical signals
First Claim
1. An apparatus for supplying power to a system for producing and processing a sampled signal resulting from the sampling of an information signal with a sampling frequency fs, comprising switch means controlling the supplying of said power to said system, and means to control said switch means to cause said switch means to operate at a frequency which is a multiple of one or more times half of the sampling frequency fs and synchronized with said sampling frequency.
1 Assignment
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Accused Products
Abstract
In a circuit supplying a digital system, the frequency at which the switching device therein is controlled is synchronized to be the same as one or several times half the sampling frequency. In this way, the original frequency spectrum can be kept free from interfering signals.
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Citations
17 Claims
- 1. An apparatus for supplying power to a system for producing and processing a sampled signal resulting from the sampling of an information signal with a sampling frequency fs, comprising switch means controlling the supplying of said power to said system, and means to control said switch means to cause said switch means to operate at a frequency which is a multiple of one or more times half of the sampling frequency fs and synchronized with said sampling frequency.
- 14. A method of supplying power at a predetermined level to a system for producing and processing a sampled signal resulting from the sampling of an information signal with a sampling frequency fs, comprising the steps of providing an alternating current, rectifying and filtering said alternating current to obtain a direct current, and interrupting said direct current periodically and subsequently disinterrupting said direct current with a frequency equal to a multiple of one or more times half of said sampling frequency fs.
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16. A method of supplying power at a predetermined level to a system for producing and processing a sampled signal resulting from the sampling of an information signal with a sampling frequency fs, comprising the steps of providing an alternating current, adapting and synchronizing the frequency of said alternating current to a frequency which is a multiple of one or more times half of said sampling frequency fs, rectifying said adapted and synchronized alternating current at a frequency related to said frequency which is a multiple of one or more times half of the sampling frequency, and controlling said frequency related to said sampling frequency as a function of the voltage of said supplied power.
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17. In combination:
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a system for processing and/or producing signals resulting from the sampling of an information signal with a sampling frequency fs, a sampling frequency generator, a source for alternating current, switch means controlling the supplying of power from said source to said system, and means to control said switch means to cause said switch means to operate at a frequency which is a multiple of one or more times half said sampling frequency.
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Specification