To provide a power amplifier parallel system in which restriction to coincidence between properties of respective power amplifiers is small and which easily deals with an increase or decrease in the parallel number.
The power amplifier parallel system includes: a voltage control unit for input of a voltage signal to be amplified and a voltage feedback signal and amplifying them while performing phase compensation; a plurality of voltage control current sources comprising digital power amplifiers for current output which amplify power with a voltage signal output by a voltage control unit as an input signal; a current synthesization part for synthesizing output current from respective voltage control power supplies at one node to supply a load with power; and a voltage feedback part for feeding back the voltage at the node by prescribed feedback rate to the voltage control unit. Preferably, power supplies by ecological energy sources as operation power supplies are mixed in the voltage control current sources.
SATO YOSHIHIRO
MIYAKE YOSHIRO
OGAWA YUJI
SASAHARA YASUMASA
