关键词: 功放电路, 静态电流, 电源电压, 基区结深, 厄利电压

Abstract: Based on the case of a given power-amplifier integrated circuit in which quiescent current in creases dramatically with supply voltage,the effect of Early transistor voltage on quiescent current is analyzed.By comparing the test results of the same circuit in different process plat forms,the relativity between Early voltage and changes of quiescent current and the detriments of using shallow junction process in the manufacture of power-amplified circuits are analyzed.Results show that optimization or change of process that increases the Early transistor voltage will perfectly solves the problem.

Key words: power-amplifying circuits, quiescent current, power supply voltage, base depth, Early voltage