Digital cross cancellation system

Details Digital cross cancellation system Digital cross cancellation system

2006-10-31

2006-10-31

Choe, Henry (Department: 2817)

Amplifiers

With amplifier bypass means

C330S149000

Reexamination Certificate

active

07129778

ABSTRACT:
An amplification system and method is provided that employs a digital cross-cancellation technique which provides a separate digital signal to be input to a separate DAC to generate a cancellation signal. The cancellation signal is added to the output of the amplifier to produce a final signal with substantially reduced distortion and/or out-of-band emissions. The cancellation signal can be pre-computed or derived by generating an inverted version of the wanted signal, and combining it with a portion of the output signal to determine the error or unwanted portion of the output signal. This error signal is then combined with a delayed version of the output signal.

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patent: 6934341 (2005-08-01), Sahlman
patent: 2005/0012550 (2005-01-01), Posner et al.

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