Multichannel amplification system using mask detection

Details Multichannel amplification system using mask detection Multichannel amplification system using mask detection

H - Electricity

03

F

H03F 1/32 (2006.01) H03F 1/02 (2006.01)

Patent

CA 2286536

An apparatus and method reduce out-of-band frequency components of an amplified, multichannel RF signal able to have at least two frequency bandwidth limited signal channels, each channel having a respective carrier frequency which is not known in advance. The channels can, for example, be dedicated to CDMA signals. Each channel of the amplified RF signal has both in-band frequency components and out-of-band frequency components. The apparatus and method feature a network for amplifying an input signal for producing the amplified RF signal, the network having adjustable electrical characteristics, and a control system connected to the network for locating a frequency within the bandwidth of one of the channels of the amplified RF signal and for detecting energy in the out-of-band frequency components for the one located channel for producing control signals relating to the energy in that one channel. As a result of adjusting the electrical characteristics of the network, the energy in the out-of- band frequency components for that channel, and all other channels of interest, can be reduced.

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