7. Examples

The BLA-based DCA will now be applied to several examples. First, a two-stage Miller op-amp is analysed to show the importance of the correlation between distortion sources in a real examples. With the second example, a Doherty power amplifier, the DCA is shown to work for strongly non-linear circuits as well. The weakly non-linear assumption doesn’t hold in such an amplifier, so the BLA of the sub-circuits is estimated with zippered multisines. The third and last example deals with a considerably larger circuit. The distortion contribution analysis of a a fully differential Gm-C biquad is used to illustrate how the DCA can be applied hierarchically.