Abstract: In a wideband amplifier whose bandwidth is increased using a parallel feedback transistors(PFT), capacitive elements are connected between the first and seventh nodes which are emitters of the seventh and eighth transistors which are parallel feedback transistors, and alternating current(AC) grounds, wherein outputs are supplied from the first and seventh nodes, and the emitter follower buffers are coupled to the first and seventh nodes so that a negative feedback current is leaked through the collector parasitic capacitances of emitter follower buffer transistors. The bandwidth of the amplifier is greatly increased without making the circuit complex.