Analysis of drivers for single-ended push-pull stage

Push-pull stages require two opposite-phase driving voltages of the same amplitude. In conventional push-pull amplifiers, this is not a problem, in single-ended push-pull amplifiers, however, this requirement limits the types of usable drivers because of the apparently unbalanced structure of the push-pull stage. Four possible drivers, namely, the split-load phase inverter driver, the cathode-coupled phase inverter driver, the extended cathode-coupled phase inverter driver, and the Coulter driver, are analyzed with stress on the balance of the driving voltages.