Method and apparatus for automatic reduction of noise in signals transmitted over conductors
First Claim
1. An apparatus for automatic noise filtering of a signal transmitted over conductors comprising:
- a discrete gain amplifier comprising a plurality of discrete gain amplifier stages that provides selectable amounts of amplification to said signal, said discrete gain amplifier stages being daisy-chained such that they may be selectively applied to the signal; and
a plurality of noise filters comprising a plurality of noise filter circuits corresponding to said plurality of discrete gain amplifier stages that provide selectable amounts of noise filtering to said amplified signal.
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Abstract
A method and apparatus for automatic reduction of noise in video signals transmitted over conductors is presented. The present invention provides an adjustable amount of noise filtering matched to the amount of gain provided by an adjustable gain amplifier to a received video signal. One or more stages of a multi-stage discrete gain amplifier is provided with a corresponding noise filter circuit. The filter circuit is matched to the frequency response of and the amount of gain provided by the discrete gain amplifier stage. When the amplifier stage is applied to the received signal, the corresponding noise filter for that stage is invoked as well. In that manner, the amount of noise filtering applied to a video signal automatically varies with the amount of amplification provided to that signal.
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Citations
7 Claims
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1. An apparatus for automatic noise filtering of a signal transmitted over conductors comprising:
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a discrete gain amplifier comprising a plurality of discrete gain amplifier stages that provides selectable amounts of amplification to said signal, said discrete gain amplifier stages being daisy-chained such that they may be selectively applied to the signal; and a plurality of noise filters comprising a plurality of noise filter circuits corresponding to said plurality of discrete gain amplifier stages that provide selectable amounts of noise filtering to said amplified signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification