shanmei
Advanced Member level 1
I am told that power amplifier should be biased at saturation region.
For the bipolar process, as shown in the figure, the saturation region( linear region) is at the left side, which is different from the saturation region of CMOS.
So I need to bias the power amplifier to the B node, right? It is at the center of the ac loadline. The ac signal will have large swing.
Bias the base of the BJT to node A is not right? Since it is the DC loadline center point, but it is not good for ac signal( large signal ) has large swing, which will clip the signal swing.
Is my understanding right? Thanks.
For the bipolar process, as shown in the figure, the saturation region( linear region) is at the left side, which is different from the saturation region of CMOS.
So I need to bias the power amplifier to the B node, right? It is at the center of the ac loadline. The ac signal will have large swing.
Bias the base of the BJT to node A is not right? Since it is the DC loadline center point, but it is not good for ac signal( large signal ) has large swing, which will clip the signal swing.
Is my understanding right? Thanks.