A novel injection-locked balanced oscillator (ILBO) topology is proposed. T
he circuit is simple to design, small and has low power consumption. The ex
ternal injection signal is applied at the centre point of the balanced osci
llator with a minor increase in complexity for the matching circuit. The te
chnique is demonstrated practically in the 1.8GHz band. An excellent amplit
ude and phase balance of the ILBO is achieved.