| 2. | Usually the low power operational amplifier is designed with rail to rail output stage , whose signal dynamirange is small , its output driving force is not strong , here it is designed with voltage displacement stage , and the strong driving force and the low power consumption in this circuit are achieved . with 5v single power , this amplifier consumes only several a , 100khz unity - gain frequency , achieves 80db dc open gain and 55 phase margin for a 100pf load capacitance and a 1m load resistance and other advantages
通常设计的低功耗轨对轨输出运算放大器中,由于信号的动态范围比较小,它的输出驱动能力不强,这里设计的是采用电平位移电路同时实现了电路的强驱动能力与低功耗,它具有在单电源电压5v的条件下,静态工作电流只有几微安,单位增益带宽达100k ,开环增益能达80db以上,相位裕度也能达55度,输出源沉电流达500微安以上等优点。 |
