POWER AMPLIFIER Russian patent published in 2004 - IPC

FIELD: radio engineering; radio communications; pager and cellular communication transmitters; television and radio broadcast.

SUBSTANCE: power amplifier has input and output amplifier stages 1, 2, first capacitor 3 inserted between output of input amplifier stage 1 and input of output amplifier stages 2, first resistor 4 connected in parallel with first capacitor 3, bipolar transistor 5, second capacitor 6 inserted between collector of bipolar transistor 5 and output of input amplifier stage 1, third capacitor 7 inserted between emitter of bipolar transistor 5 and input of output amplifier stage 2; second and third resistors 8, 9, fourth and fifth resistors 10, 11, sixth and seventh resistors 12, 13 are inserted in pairs and in series between power supply and conductor common for entire device; points of connection of paired resistors are connected, respectively, to emitter, base, and collector of bipolar transistor 5. Power amplifier makes it possible to steplessly change slope of amplitude response in vicinity of high input voltages thereby enhancing dynamic range.

EFFECT: enlarged dynamic range of power amplifier.

1 cl, 4 dwg