Application of automatic searching for determining the sign of disequilibrium in dc balancing circuits

Conclusions

• 1. It is possible to use automatic searching to determine the sign of an unbalance in dc balancing circuits.

• 2. Automatic searching in dc circuits can be accomplished by means of an extremalyzer, a nonlinear device whose function is to provide an extremal characteristic with respect to the dc voltage or another signal proportional to the direct voltage.

• 3. An extremalyzer using transistors with various transconductances provides balancing circuits of a sensitivity of 1 mV, with a tentative response sinusoidal voltage of 50 kHz and an ac amplifier with a threshold of sensitivity of 50 μV.