A fluidic oscillator is disclosed which incorporates a flexurally mounted jet pipe adapted to oscillate and discharge alternately into a pair of receivers. The jet pipe includes a pair of opposed reaction surfaces radially displaced from its rotational axis and aligned with a pair of driving ports. Output from the jet pipe receivers is amplified by a proportional fluid amplifier, and a negative feedback is provided whereby fluid output from the proportional amplifier is directed to the driving ports and issued therefrom as a pulsating jet stream to promote oscillation of the jet pipe. In an alternative embodiment, the proportional fluid amplifier is replaced by a digital fluid amplifier.