Wide band transmitter end stage for short wave range

摘要

The transmitter end stage includes a push-pull transistor stage and a push-pull output transformer. A following harmonics filter is formed by a frequency filter with a low pass (1) and a high pass (2). The low pass output (3) feeds the transmitter end stage active load. The high pass feeds an harmonics absorber (4) which forms a real ohmic resistor. Preferably, the high pass is so designed that the impedance of the harmonics absorber is transformed to the power FETs (5,7) in a purely real or in a complex manner.