Amplifiers – With pilot frequency control means
Patent
1996-07-19
1998-09-29
Mottola, Steven
Amplifiers
With pilot frequency control means
330151, H03F 366
Patent
active
058150366
ABSTRACT:
A method and apparatus for controlling a feedforward amplifier, wherein a superior distortion compensation characteristic is maintained over a wide frequency range, with the influence due to temperature variation and weathering minimized. A pilot signal generated by a pilot signal generator circuit is injected into the output of the main amplifier of a feedforward amplifier, and then the signal is sampled at the output of a first circuit and a second circuit, which is then low-range converted by a frequency converter and demodulated into I and Q components by a quadrature demodulator, and amplified and shaped into a pilot monitor signal; and a control circuit controls the vector adjusters within the distortion suppression circuit of the first and the second circuits using the I and Q signal components as the error signal so that as the amplitude level of pilot monitor signal is mininized the control value is maintained.
REFERENCES:
patent: 4617522 (1986-10-01), Tarbutton et al.
patent: 5323119 (1994-06-01), Powell et al.
patent: 5485120 (1996-01-01), Anvari
patent: 5489875 (1996-02-01), Cavers
patent: 5508657 (1996-04-01), Behan
Adachi Hisashi
Kosugi Hiroaki
Nagao Kazuo
Yoshikawa Yoshishige
Matsushita Electric - Industrial Co., Ltd.
Mottola Steven
LandOfFree
Apparatus and method for controlling feedforward amplifier does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for controlling feedforward amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for controlling feedforward amplifier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-689109