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- W929120783 abstract "The signal from the main antenna is a mixture of the desired signal and a locally generated noise signal. This huge amount of interference weakens the main signal, and can be got rid of by inverting the noise signal and combining it with the signal from the main antenna. When the phase-inverted noise signal combines with the noise signal riding on the main signal, the result is cancellation of the noise signal, leaving the resultant main signal. This approach of “invert and obliterate” for overcoming noise is described in the chapter. A simple bridge circuit is also discussed in the chapter. It consists of two transformers (T1 and T2), of which transformer T1 is trifilar wound and T2 is bifilar wound, that is, T1 has three identical windings and T2 has two identical windings, interwound with each other. The composite output of T1, the noise plus desired signal and the inverted noise signal, is applied to transformer T2. This transformer is inserted into the line as a common-mode choke and performs the actual cancellation of the inverted and noninverted noise signal components. Radiated noise that is one of the most intractable electromagnetic interference (EMI) problems can be rectified with the aid of these bridges, which perform sufficient noise reduction to make a significant difference in the signal-to-noise ratio." @default.
- W929120783 created "2016-06-24" @default.
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- W929120783 date "2000-01-01" @default.
- W929120783 modified "2023-09-25" @default.
- W929120783 title "Noise Cancellation Bridges" @default.
- W929120783 doi "https://doi.org/10.1016/b978-075067233-7/50010-7" @default.
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