Polarity independent differential amplifier

摘要

The amplifier includes symmetrical outputs which phase shifts are as identical as possible with the phase shift of an input signal, when the input signal is supplied to one input only, while the other one is earthed. Each random selected transistor of the incorporated circuit has its own complementary transistor operated in the same static and dynamic working point. The signal paths from each input to the required output, from which the signal is passed, are theoretically mutually identical when earthing the other input. The output zero point error of the last amplifier stage remains the same irrespective of the number of DC series coupled amplifier stages.