发明名称 |
Apparatus and method for controlling feedforward amplifier |
摘要 |
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.
|
申请公布号 |
US5815036(A) |
申请公布日期 |
1998.09.29 |
申请号 |
US19960684384 |
申请日期 |
1996.07.19 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
YOSHIKAWA, YOSHISHIGE;KOSUGI, HIROAKI;ADACHI, HISASHI;NAGAO, KAZUO |
分类号 |
H03F1/32;H03F1/42;H04B1/10;(IPC1-7):H03F3/66 |
主分类号 |
H03F1/32 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|