Hybrid matrix amplifier with noise reduction

H - Electricity – 03 – F

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H03F 1/32 (2006.01) H03F 3/60 (2006.01)

Patent

CA 2255795

An input signal (102) and a dithering signal (106) are coupled to an input of an n by m transform matrix (98). The input signal (102) and the dithering signal (106) are transformed to produce m transformed signals, which are then amplified using a plurality of amplifiers (64). The amplified signals are then input into an m by n inverse transform matrix (100) that performs an inverse transform to produce a low noise output signal. The low noise output signal may be passed through a band pass filter (74) to remove out-of-band noise derived from the dithering signal and provide a filtered output signal (110). The transform matrix (98) and inverse transform matrix (100) may be implemented with Fourier transform matrices or a Butler transform matrices.

On a couplé un signal d'entrée (102) et un signal de juxtaposition (106) à une entrée d'une matrice (98) à transformée (n) par (m). Le signal d'entrée (102) et le signal de juxtaposition (106) sont transformés pour donner des signaux transformés (m), lesquels sont ensuite amplifiés à l'aide de plusieurs amplificateurs (64). Puis le signaux amplifiés sont entrés dans une matrice (100) à transformée inverse (m) par (n), laquelle effectue une transformée inverse pour produire un signal de sortie à faible niveau de bruit pouvant ensuite passer à travers un filtre passe-bande (74) afin que celui-ci enlève le bruit hors bande dérivé du signal de juxtaposition et produise un signal de sortie filtré (110). On peut effectuer une implémentation de la matrice de transformée (98) et de celle de transformée inverse (100) à l'aide de matrices à transformée de Fourier ou de matrices à transformée de Butler.

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