Amplifier

Details Amplifier Amplifier

2007-03-13

2007-03-13

Nguyen, Patricia (Department: 2817)

Amplifiers

With amplifier bypass means

C330S149000

Reexamination Certificate

active

11089135

ABSTRACT:
There is provided an amplifier that achieves stable distortion compensation without using a pilot signal even when there is a difference in level in the base signal of a multicarrier signal. The amplifier is a feedforward amplifier for amplifying a multifrequency wideband signal without using a pilot signal, and includes an input monitoring section in a signal input stage and an output monitoring section in a signal output stage, whereby for fluctuations in level of the signal from the monitoring sections, when the signal level is decreased to cause a significant decrease in the level of adjacent channel leakage power (ACP) and when the signal level does not decrease to cause a slight increase in ACP level, the controller shifts a set ACP reception frequency to an opposite frequency of the multicarrier signal, thereby achieving stable distortion compensation even when there is a difference in level in the base signal of a multicarrier signal.

REFERENCES:
patent: 6744315 (2004-06-01), Ezuka
patent: 6756844 (2004-06-01), Nanao et al.
patent: 6791410 (2004-09-01), Kim et al.
patent: 6900693 (2005-05-01), Sasho et al.
patent: 7035345 (2006-04-01), Jeckeln et al.
patent: 7091782 (2006-08-01), Jacob
patent: 7106134 (2006-09-01), Khanifar et al.
patent: 2003-283259 (2003-10-01), None

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