| 摘要 |
A D.C. bias current compensation circuit for a nonlinear amplifier (10) includes a compensating amplifier (128) of substantially the same circuit configuration as that of the nonlinear amplifier (10), and a current mirror (122) for coupling the compensation amplifier (128) to the nonlinear amplifier (10) to be compensated. The compensating amplifier (128) is provided with feedback from its output to its input, so that a D.C. bias current provided to the output of the compensating amplifier (128) can be used to compensate the D.C. input bias current of the nonlinear amplifier (10). In this manner, the nonlinear amplifier (10) can be compensated for changes in gain due to temperature or manufacturing process variations. |
