| 摘要 |
PURPOSE:To provide a method for stabilizing gain variation caused by the dispersion of a transistor constant or the effect of a stray element with a simple method concerning the stabilizing method of an amplifier. CONSTITUTION:A signal resulting from superimposing a pilot signal, which is generated by a pilot signal generating means 1, on an input signal by using a pilot signal superimposing means 2 is amplified by an amplifying means 5, the pilot signal is extracted from the amplified signal by a pilot signal extracting means 3, the amplitude of the extracted pilot signal is compared with that of the superimposed pilot signal by a comparing means 4 and based on the voltage of this compared result, the bias of the amplifying means 5 is adjusted. |
