| 摘要 |
<p>A dynamic biasing circuit monitors an input signal to a selected amplifier and compensates for variances in the amplifier's collector current by adjusting the amount of biasing DC quiescent current as the power amplitude of the input signal increases or decreases, respectively. To this end, the dynamic biasing circuit includes a detector section that detects and averages the input signal power, and a bias regulator that references a DC output signal from the detector section and accordingly adjusts a DC quiescent collector current of a biased amplifier device. The amplifier's collector current may thereby be maintained at a substantially optimum level in order to minimize negative intermodulation performance.</p> |
