The invention relates to a millimeter frequency oscillator using integrated circuit technology. The oscillator includes a microwave output (Sf) providing an oscillation frequency Fout as a function of a control signal Vt. The oscillation frequency Fout may be modulated around a central frequency Fc via two control inputs of the oscillator, a first control input Ec1 driven by a first control signal Vt1 fixing the central frequency Fc of the oscillator and a second control input Ec2 driven by a second control signal Vt2 allowing linear modulation of this central frequency Fc. The control signal Vt of the oscillator is a function of the two control signals Vt1 and Vt2.