| 摘要 |
<p>In a consumption power controlling apparatus for a GaAs FET amplifier, even when the consumption power is controlled, changes respectively in the gain, the phase, and the deviation of gain within a band, can be minimized. A resistor (3) is connected between a first power source (1) and the drain of a GaAs FET (7), and a variable resistor (6) having an adjusting member is arranged between the output terminals of the first power source and of a variable voltage circuit (4). The adjusting member is connected to the gate of the GaAs FET. Control means (5) having two input terminals connected across the resistor (3) supplies a control signal voltage developed across the resistor to be substantially equal to a predetermined reference value, thereby obtaining a fixed drain current of the FET. <IMAGE></p> |
