Conclusions

In this chapter we have studied the application of balancing techniques. We have introduced balancing as a form of additive compensation. This error reduction technique is capable of reducing reproducible errors due to even order nonlinearity, including its temperature dependency.

The two balancing techniques: anti-series connection and complementary-parallel connection are of special interest for amplifier design. Anti-series connection of the basic three-terminal amplifier stages yields a four terminal stage with improved port isolation. Complementary-parallel connection provides a push-pull stage that exhibits a high current drive capability at a low quiescent current. The noise performance of the balanced stage is similar to that of its unbalanced version. The same holds for the dynamic performance. Hence, their application for the improvement of the linearity, the reduction of the offset and temperature drift, the improvement of the port isolation and the extended current drive capability is only at the cost of circuit complexity.