发明名称 |
FEED-FORWARD AMPLIFIER AND CONTROLLER OF THE SAME |
摘要 |
A feed-forward amplifier and a controller thereof. Two types of second pilot signals, sum frequency and difference frequency of a base pilot signal and a local oscillation signal, are generated by an injection-side mixer and injected into a distortion detection loop. Part of a signal appearing at an output terminal is branched, converted in frequency by a detection-side mixer using the local oscillation signal, filtered by a narrow-band filter, input to a synchronizing detector with the filtered output of the filter as error signals, and synchronizing detected with reference to the base pilot signal so as to generate control signals for a distortion rejection loop. The spectrums of the second pilot signals may be spread. A process to cancel the input signal component at the detection side may be performed. A simple circuit configuration enhances the distortion component rejection and suppression effect and shortens the time required until an optimum control state is established.
|
申请公布号 |
CA2327510(A1) |
申请公布日期 |
2001.06.28 |
申请号 |
CA20002327510 |
申请日期 |
2000.12.04 |
申请人 |
JAPAN RADIO CO., LTD. |
发明人 |
SAKAMOTO, HIRONORI;KAWASUMI, NORIHISA;ITO, KEIJIRO;YAMADA, AKIRA;YAMASHITA, KAZUO;ITO, AKIRA |
分类号 |
H03F1/32;(IPC1-7):H03F1/32;H04Q7/36 |
主分类号 |
H03F1/32 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|