FIELD: radio engineering. SUBSTANCE: power amplifier with double operational mode has one amplifier as minimum having input of collector supply, signal input and output. Amplifier generating signal across output has enhanced parameters of input signal fed to signal input. Voltage converter has supply input and output connected to input of collector supply, input for selection of mode for generation of first voltage across output in response to first controlling signal and of second voltage in response to second controlling signal. Both first and second controlling signals go to input for selection of mode. Analog mode is selected by first controlling signal and digital mode is selected by second controlling signal. Voltage converter can be pulse power supply source with voltage Vcc across input of power supply. Pulse power supply source is switched off under digital mode letting voltage Vcc pass through voltage converter to output and is switched on under analog mode to supply preset voltage to output. EFFECT: development of amplifier for operation under digital and analog modes. 8 cl, 5 dwg, 1 tbl
